David's Astronomy Pages CCD Images - Session 856 (2021-01-31)

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Session Notes

156P/Russell-LINEAR - Comet     Nova Per 2020 - Nova (V1112 Per, AT2020abap)     AT2021bfs - Transient Fe-II Star in M31     NGC 684 - Spiral Galaxy with Type II Supernova 2021ass     SN 2021xn - Type Ia Supernova in PGC 6041     UGC 2505 - Irregular Galaxy with Type II Supernova 2021bge     Variable Stars (photometric monitoring) - RX And, TT Ari, SY Cnc, U Gem, U Mon, FO Ori, FU Ori     Nearby Stars (astrometric monitoring) - Groombridge 34

- All Night session (5.4 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. - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: -2°C (min) - CCD Temperature:  -25°C - Notes from 2021-01-31 >>    [ Local Files >> ]   -

156P/Russell-LINEAR - Comet

156P/Russell-LINEAR (passing through Triangulum) Sun Distance 1.59 AU  (receeding) Earth Distance 1.14 AU (170.4 million km)		156P/Russell-LINEAR - 2021-02-01  Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 115.95 arcsec/hr, Dec 31.85 arcsec/hr)
CCD Image (50% size, square root scale) 2 x 45s exposure (average combine), 3x3 binning, C Filter 2021-02-01 20:21 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 2021-02-01 20:21 UT (#857072-80) 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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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 - 2021-01-31 (T+67.1d) Image below (2021-01-31.917) was taken 67.1 days after discovery of 2020abap Nova is shown by white cross hairs.  Measured magnitude ? (faded since last image) Poor quality image (single frame/ bright sky background)

CCD Image (100% size, linear scale, cropped) 90s exposure (single frame), 3x3 binning, C Filter 2021-01-31 22:02 UT (#856118) 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 - 2021-01-31 (T+13.6d) Image below (2021-01-31.785) was taken 13.6 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 2021-01-31 19:00 UT (#856004-08) 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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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 - 2021-01-31 (T+21.6d) Image below (2021-01-31.801) was taken 21.6 days after discovery of 2021xn SN is shown by white cross hairs.  Measured Magnitude +15.7 (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 2021-01-31 19:23 UT (#856012-16) 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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AT2021bfs - Transient Fe-II Star in M31

AT2021bfs in M31 (Andromeda) AT2021bfs (Type: FeII) discovered 2021/01/26.720 UT by Italian Supernovae Search Project Alias: PNV-OMB15, PNV J00425220+4116246

AT2021bfs in M31 - 2021-01-31 (T+5.1d) Transient is shown by white circle.

Annotated CCD Image  (70% 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

AT2021bfs 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 AT2021bfs 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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UGC 2505 - Irregular Galaxy with Type II Supernova 2021bge

UGC 2505 with SN2021bge (Cetus) SN 2021bge (Type: II) discovered 2021/01/27.517 UT by Koichi Itagaki Alias: ATLAS21dfn, Gaia21aqd Discovery Magnitude 16.8 (Clear Filter) vs Prior Non-Detection in DSS Image Confirmed SN II  ( Rochester Supernova site | Discovery Image  ) ( TNS 2021bge | Gaia21aqd )

UGC 2505 with SN2021bge - 2021-01-31 (T+4.3d) SN is shown by white cross hairs.

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-01-31 20:57 UT (#856062-66) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 2505 with SN2021bge - 2021-01-31 (T+4.3d) Image below (2021-01-31.867) was taken 4.3 days after discovery of 2021bge SN is shown by white cross hairs.  Measured Magnitude +16.35

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-01-31 20:57 UT (#856062-66) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 2505 - Later Image (2021-12-05, T+312.4d) Image below (2021-12-05.872) was taken 312.4 days after discovery of 2021bge SN has long since faded and is no longer visible in image below

Annotated CCD Image  (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-12-05 21:02 UT (#939096-98) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN2021bge (UGC 2505) on Supernovae 2021 Page >>

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