David's Astronomy Pages CCD Images - Session 857 (2021-02-01)

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Session Notes

SN 2021xn - Type Ia Supernova in PGC 6041 UGC 784 - Spiral Galaxy with Type Ia Supernova 2021pc BNR2017 J014710+463040 - Quasar (Andromeda's Parachute) UGC 1436 - Spiral Galaxy with Type Ia Supernova 2021nv 156P/Russell-LINEAR - Comet UGC 2505 - Irregular Galaxy with Type II Supernova 2021bge 398P/Boattini - Comet AT 2021bfs - Transient Fe-II Star in M31 Nova Per 2020 - Nova (V1112 Per, AT2020abap) NGC 684 - Spiral Galaxy with Type II Supernova 2021ass NGC 4145 - Spiral Galaxy AT 2021rl - BL Type Transient (QSO 0954+658) UGC 6930 - Spiral Galaxy with Type Ia Supernova 2020rcq C/2020 M3 (Atlas) - Comet KUG 0830+278 - Galaxy with Type  Ic-BL Supernova 2020adow 2MASX J12303540+4257559 - Galaxy with AGN / Transient AT 2021bgi NGC 4151 - Spiral Galaxy with AGN Outburst NGC 4227 - Spiral Galaxy with Type Ia Supernova 2021biz NGC 4631 - Spiral Galaxy with Type LRN Transient AT 2021biy     Variable Stars (photometric monitoring) - RX And, U Gem, GK Per     Nearby Stars (astrometric monitoring) - None

- All Night session (11.4 hours) - Main aims of the session were to acquire a selection of variable star, nearby star and comet targets and deep sky targets as cloud/showers allowed, acquire images of the gravitionally lensed quasar known as Andromeda's Parachute and to test new feature and bugs fixes in AstroMain 3.35.9 - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: -4°C (min) - CCD Temperature:  -25/-350°C - Notes from 2021-02-01 >>    [ Local Files >> ]   -

SN 2021xn - Type Ia Supernova in PGC 6041

SN 2021xn (Perseus) Faint Galaxy (PGC 6041, SDSS J013751.16+533958.8, catalog mag +16.1) with Type Ia Supernova [ Supernovae ] SN 2021xn (Type: Ia) discovered 2021/01/10.158 UT by ZTF Alias: ZTF21aacvhsc  (Rochester Supernova site | Claudio Balcon image  )

PGC 6041 with SN 2021xn - 2021-02-01 (T+22.6d) Image below (2021-02-01.772) was taken 22.6 days after discovery of 2021xn SN is shown by white cross hairs.  Measured Magnitude +15.2 (magnitude based on WCS link on cropped image using GSC stars) (too many stars for full frame WCS Link using UCAC stars)

Annotated CCD Image  (150% size, log scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-01 18:40 UT (#857012-16) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021xn (PGC 6041) on Supernovae 2021 Page >>

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UGC 784 - Spiral Galaxy with Type Ia Supernova 2021pc

UGC 784 with SN 2021pc Cetus) [ Supernovae 2021 ] SN 2021pc (Type: Ia) discovered 2021/01/07.160 UT by ZTF Magnitude +18.3 at discovery Alias: ZTF21aabpszb, Gaia21adm  (Rochester Supernova site | TNS | )

UGC 784 with SN 2021pc - 2021-02-01 (T+25.6d) Image below (2021-02-01.786) was taken 25.6 days after discovery of 2021pc SN is shown by white cross hairs.  Measured Magnitude +15.8

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-01 19:02 UT (#857020-24) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021pc (UGC 784) on Supernovae 2021 Page >>

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BNR2017 J014710+463040 - Quasar (Andromeda's Parachute)

BNR2017 J014710+463040 (Andromeda) Alias: Andromeda's Parachute,  PS J0147+4630 Gravitationally Lensed Quasar Quasar shown by white cross hairs

Annotated CCD Image  (35% size, square root scale) 4 x 120s exposure (average combine), 2x2 binning, C Filter 2021-02-01 19:31 UT (#857038-43) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated CCD Image  (100% size, square root scale, cropped) Image details as above First Described by Berghae et al 2017 (Discovery of the first quadruple gravitationally lensed quasar candidate with Pan-STARRS) Image below is from Berghae 2017 paper, reproduced at bobmoler.files.wordpress.com )

[cf.  Goicoechea & Shalyapin image ]

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UGC 1436 - Spiral Galaxy with Type Ia Supernova 2021nv

UGC 1436 with SN 2021nv (Aries) [ Supernovae 2021 ] SN 2021nv (Type: Ia) discovered 2021/01/07.263 UT by ATLAS Magnitude +17.8 at discovery Alias: ATLAS21aqr  (Rochester Supernova site | Claudio Balcon image | )

UGC 1436 with SN 2021nv - 2021-02-01 (T+25.6d) Image below (2021-02-01.829) was taken 25.6 days after discovery of 2021nv SN is shown by white cross hairs.  Measured Magnitude +16.3

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-01 20:03 UT (#857064-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021nv (UGC 1436) on Supernovae 2021 Page >>

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156P/Russell-LINEAR - Comet

156P/Russell-LINEAR (passing through Triangulum) Sun Distance 1.58 AU  (receeding) Earth Distance 1.13 AU (168.7 million km)		156P/Russell-LINEAR - 2021-01-31  Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 115.69 arcsec/hr, Dec 32.73 arcsec/hr)
CCD Image (50% size, square root scale) 2 x 45s exposure (average combine), 3x3 binning, C Filter 2021-02-01 20:20 UT (#857074-75) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, square root scale, cropped) 8 x 45s exposure (average combine), 3x3 binning, C Filter 2021-01-31 21:54 UT (#856108-16) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 156P/Russell-LINEAR on Comets 2020 Page >>

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UGC 2505 - Irregular Galaxy with Type II Supernova 2021bge

UGC 2505 with SN 2021bge (Cetus) SN 2021bge (Type: II) discovered 2021/01/27.517 UT by Koichi Itagaki Alias: ATLAS21dfn, Gaia21aqd  ( Rochester Supernova site | Discovery Image  )

UGC 2505 with SN 2021bge - 2021-02-01 (T+5.3d) Image below (2021-02-01.856) was taken 5.3 days after discovery of 2021bge SN is shown by white cross hairs.  Measured Magnitude +16.4

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-01 20:41 UT (#857084-88) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021bge (UGC 2505) on Supernovae 2021 Page >>

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398P/Boattini - Comet

398P/Boattini (passing through Orion) Sun Distance 1.37 AU (receeding) Earth Distance 0.50 AU (74.3 million km)		398P/Boattini - 2021-02-01, Detail Alias: P/2020 P2 (Boattini) Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 87.17 arcsec/hr, Dec 68.97 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 2 x 45s exposure (average combine), 3x3 binning, C Filter 2021-02-01 20:54 UT (#857092-93) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, square root scale, cropped) 8 x 45s exposure (average combine), 3x3 binning, C Filter 2021-02-01 20:56 UT (#857092-100) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 398P/Boattini on Comets 2020 Page >>

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AT 2021bfs - Transient Fe-II Star in M31

AT 2021bfs in M31 (Andromeda) AT 2021bfs (Type: FeII) discovered 2021/01/26.720 UT by Italian Supernovae Search Project Alias: PNV-OMB15, PNV J00425220+4116246

AT 2021bfs in M31 - 2021-02-01 (T+6.2d) Image below (2021-02-01.883) was taken 6.2 days after discovery of 2021bfs Transient is shown by white cross-hairs

Annotated CCD Image  (100% size, log scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-01 21:19 UT (#857105-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021bfs in M31 - 2021-01-31 (T+5.1d) Image below (2021-01-31.816) was taken 5.1 days after discovery of 2021bfs Transient is shown by white cross-hairs

Annotated CCD Image  (100% size, log scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-01-31 19:45 UT (#856019-23) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Earlier Image 2020-10-23 Image below (2020-10-23) was taken several  months before discovery of AT 2021bfs Position of later transient is shown by white circle.   No indication of any object at position of AT2021bfs

Annotated CCD Image (100% size, square root scale, cropped) 3 x 120s exposure (average combine), 3x3 binning, C Filter 2020-10-23 20:40 UT (#820069-72) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT2021bfs on M31 Page >>

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Nova Per 2020 - Nova (V1112 Per, AT2020abap)

Nova Per 2020 (Perseus) Nova in Perseus discovered 2020/11/25.807 [ Novae ] Nova Per 2020 discovered independently by Seiji Ueda and Stanislav Korotkiy et al AT2020abap (Type: CV) reported 2020/11/27.230 UT by PGIR Alias: N Per 2020 , PGIR20fbf, TCP J04291888+4354233, TCP J04291884+4354232, V1112 Per

Nova Per 2020 - 2021-02-01 (T+68.1d) Image below (2021-02-01.894) was taken 68.1 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +14.5

CCD Image (100% size, linear scale, cropped) 5 x 90s exposure (average combine), 3x3 binning, C Filter 2021-02-01 21:33 UT (#857111-15) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Per 2020 on Novae Page >>

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NGC 684 - Spiral Galaxy with Type II Supernova 2021ass

NGC 684 with SN 2021ass (Triangulum) Spiral Galaxy with Type II Supernova [ Supernovae ] SN 2021ass (Type: II) discovered 2021/01/18.145 UT by ZTF Alias: ZTF21aafepon  (Rochester Supernova site | Giancarlo Cortini image  )

NGC 684 with SN 2021ass - 2021-02-01 (T+14.8d) Image below (2021-02-01.906) was taken 14.8 days after discovery of 2021ass SN is shown by white cross hairs.  Magnitude ?

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-01 21:53 UT (#857118-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021ass (NGC 684) on Supernovae 2021 Page >>

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NGC 4145 - Spiral Galaxy

NGC 4145 (Canes Venatici)

CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-01 22:14 UT (#857125-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4145 -  Earlier wider view image (2021-01-19)

CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-01-19 05:46 UT (#852187-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4145 - Earlier wider view image (2021-01-19)

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-01-19 05:46 UT (#852187-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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AT 2021rl - BL Type Transient (QSO 0954+658)

AT 2021rl (Ursa Major) BL Type Transient, QSO 0954+658, 6C 095456+654857 AT2021rl (Type: BL) discovered 2021/01/06.449 UT by Gaia Alias: Gaia21acz   Triggering Magnitude 14.21 (vs Historic Magnitude 15.57) ( Gaia21acz )

AT 2021rl - 2021-02-02 (T+26.6d) Image below (2021-02-02.002) was taken 26.6 days after discovery of 2021rl BL Type object shown by white cross hairs. Measured magnitude +14.3  (vs catalog mag of +15.5)

Annotated CCD Image  (100% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-02-02 00:06 UT (#857195) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021rl  (QSO 0954+658) on Transients 2021 Page >>

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UGC 6930 - Spiral Galaxy with Type Ia Supernova 2020rcq

UGC 6930 with SN 2020rcq (Ursa Major) Spiral Galaxy with Type Ia Supernova [ Supernovae ] SN 2020rcq (Type 1a, z=0.002597) discovered 2020/08/09.168 by Zwicky Transient Facility (ZTF)  (Rochester Supernova site | Giancarlo Cortini image | )

UGC 6930 with SN 2020rcq - 2021-02-02 (T+176.9d) Image below (2021-02-02.026) was taken 176.9 days after discovery of 2020rcq SN is shown by white cross hairs.  Measured SN magnitude +16.4

Annotated CCD Image (100% size, square root scale, cropped) 5 x 120s exposure (average combine), 3x3 binning, C Filter 2021-02-02 00:44 UT (#857212-16) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2020rcq (UGC 6930) on Supernovae 2020 Page >>

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C/2020 M3 (Atlas) - Comet

C/2020 M3 (Atlas) (passing through Auriga) Sun Distance 1.90 AU (receeding) Earth Distance 1.13 AU (169.6 million km)		C/2020 M3 (Atlas) - 2021-02-02, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 44.51 arcsec/hr, Dec -0.82 arcsec/hr)
Annotated CCD Image (50% size, square root scaled) 15 x 15s exposure (average combine), 3x3 binning, C Filter 2021-02-02 00:58 UT (#857219-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, square root scale, cropped) Image details as left
Images of C/2020 M3 (Atlas) on Comets 2020 Page >>

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KUG 0830+278 - Galaxy with Type Ic-BL Supernova 2020adow

KUG 0830+278 (Cancer) SN 2020adow (Type: Ic-BL) discovered 2020-12-26.410 UT by ASAS-SN Alias: ASASSN-20qj  (Rochester Supernova site | Andrea Mantero image | )

KUG 0830+278 with SN 2020adow - 2021-02-02 (T+37.6d) Image below (2021-02-02.047) was taken 37.6 days after discovery of 2020adow SN is shown by white cross hairs.  Magnitude +15.6

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-02 01:17 UT (#857237-41) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2020adow (KUG 0830+278) on Supernovae 2020 Page >>

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2MASX J12303540+4257559 - Galaxy with AGN / Transient AT 2021bgi

AT 2021bgi (Canes Venatici) In 2MASX J12303540+4257559 AT 2021bgi (Type AGN, zhost=0.065590) discovered 2021/01/27.048 UT by GSNST Alias: GSNST-21ar  ( Rochester Supernova site )  [ Active Galactic Nuclei ]

2MASX J12303540+4257559 with AT 2021bgi Galaxy with transient is shown by white cross hairs.  Other galaxies in same field of view : PGC 41314 (catalog mag +16.5),  PGC 2208351 (catalog mag +17.2)

Annotated CCD Image  (50% size, square root scale) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-02 02:05 UT (#857263-66) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

2MASX J12303540+4257559 with AT 2021bgi - 2021-02-02 (T+6.0d) Image below (2021-02-02.079) was taken 6.0 days after discovery of 2021bgi Transient/Galaxy nucleus is shown by white cross hairs.  Combined magnitude +15.8

Annotated CCD Image  (125% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-02 02:05 UT (#857263-66) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021bg (2MASX J12303540+4257559) on Transients 2021 Page >>

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NGC 4151 - Spiral Galaxy with AGN Outburst

NGC 4151 with AT 2021baf (Canes Venatici) AT2021baf (Type: AGN) discovered 2021/01/22.151 UT by Gaia Alias: Gaia21aki (Gaia alert came when AGN reached mag +12.2)  ( Gaia21aki  )

NGC 4151, Seyfet Galaxy - 2021-02-02 (T+11.0d) Image below (2021-02-02.156) was taken 11.0 days after discovery of 2021baf Measured magnitude +11.8 (nucleus)

CCD Image  (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-02 03:52 UT (#857276-79) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4151, Seyfet Galaxy - 2021-01-26 (T+3.9d) Image below (2021-01-26.084) was taken 3.9 days after discovery of 2021baf Measured magnitude +11.7 (nucleus)

CCD Image  (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-01-26 02:11 UT (#855187-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image  (100% size, square root scale, cropped) Image details as above

CCD Image  (100% size, log scale, cropped) Image details as above

NGC 4151 - Earlier Image (2021-01-24, T+2.0d) Image below (2021-01-24.175) was taken 2.0 days after reported AGN  2021baf Measured magnitude +11.6 (nucleus)

CCD Image  (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-01-24 04:20 UT (#854372-75) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4151 - Earlier Wider View Image (2021-01-24) with surrounding objects of interest Galaxy NGC 4156,  bright star HIP 59295 (mag +8.1) and variable star AZ Cvn

CCD Image  (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-01-24 04:20 UT (#854372-75) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 4227 - Spiral Galaxy with Type Ia Supernova 2021biz

NGC 4227 with SN 2021biz (Canes Venatici) SN 2021biz (Type: Ia) discovered 2021/01/29.543 UT by ATLAS Alias: ATLAS21dfz  (Rochester Supernova site | Gianluca Masi image | Jean-Claude Merlin image )

NGC 4227 with SN 2021biz (T+3.6d) NGC 4227 (catalog mag +12.8) with other galaxies in field of view :  NGC 4229 (catalog mag  +13.3), PGC 39321 (catalog mag +17.0), PGC 213959 (catalog mag +17.2), PGC 2034564 (catalog mag +17.8) PGC 213960 (catalog mag +17.9), PGC 2035101 (catalog mag +18.0)

Annotated CCD Image  (100% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-02 04:17 UT (#857284-88) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4227 with SN 2021biz - 2021-02-02 (T+3.6d) Image below (2021-02-02.172) was taken 3.6 days after discovery of 2021biz SN shown by white cross hairs.  Measured magnitude +16.6

Annotated CCD Image  (125% size, linear scale, cropped)  2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-02 04:17 UT (#857284-88) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021biz (NGC 4227) on Supernovae 2021 Page >>

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NGC 4631 - Spiral Galaxy with Type LRN Transient AT 2021biy

NGC 4631 with AT 2021biy (Canes Venatici) AT 2021biy (Type: LRN) discovered 2021/01/29.559 UT by ATLAS Alias: ATLAS21dfy (Discovery Note)  (Rochester Supernova site | Odd Trondal image | Nick James image ) LRN = Luminous Red Nova [ LRN Transients ]

NGC 4631 with AT 2021biy Other galaxy in same field of view is NGC 4627 (catalog mag  +12.0)

Annotated CCD Image  (70% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-02 04:39 UT (#857292-94) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image (70% size, square root scale, cropped) Image details as above

NGC 4631 with AT 2021biy - 2021-02-02 (T+3.6d) Image below (2021-02-02.190) was taken 3.6 days after discovery of 2021biy LRN shown by white cross hairs.  Measured magnitude +16.6

Annotated CCD Image  (100% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-02 04:39 UT (#857292-94) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4631 before AT 2021biy - 2015-04-21 Image below (2015-04-21) was taken 2110 days before discovery of LRN 2021biy Position of the later LRN is shown by a white circle.

Annotated CCD Image  (95% size, square root scale, cropped) 3 x 90s exposure (average combine), 3x3 binning, C Filter 2015-04-21 00:29 h UT (#585105-07) 12" LX200R  (at f/10.4) + ST-10XME

Images of AT 2021biy (NGC 4631) on Transients 2021 Page >>

NGC 4631 ("Whale Galaxy") - Earlier Image (Apr 2015)

CCD Image (75% size, cropped) 3 x 90s exposure (average combine), 3x3 binning, C Filter 2015-04-21 00:29 h UT (#585105-07) 12" LX200R  (at f/10.4) + ST-10XME [uncropped, 75% size]

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