David's Astronomy Pages CCD Images - Session 877 (2021-03-29)

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AT 2021dbp - Type CV Transient AT 2021ckv - Type YSO Transient  (GCVS PR Ori) IC 357 - Spiral Galaxy with AT2021fyd (unconfirmed) AT 2021gyc - CV Type Transient UGC 3502 - Spiral Galaxy with Type Ia Supernova 2021cwc NGC 3310 - Spiral Galaxy (Herschel IV-60) with SN 2021gmj UGC 5829 - Irregular Galaxy with LBV Transient AT 2021blu NGC 4227 - Spiral Galaxy with Type Ia Supernova 2021biz UGC 5760 - Spiral Galaxy with Type II Supernova 2020zoq UGC 6930 - Spiral Galaxy with Type Ia Supernova 2020rcq 2MASX J12303540+4257559 - Galaxy with AGN / Transient AT 2021bgi Nova Per 2020 - Nova (V1112 Per, AT 2020abap) NGC 3515 - Spiral Galaxy with Possible Transient AT 2021fmd MCG +6-30-84 - Galaxy (PGC 48870) with Type Ia Supernova 2021K NGC 4631 - Spiral Galaxy with Type LRN Transient AT 2021biy C/2020 T2 (Palomar) - Comet 7P/Pons-Winnecke - Comet AT 2021hdk - CV Type Transient     Variable Stars (photometric monitoring) - R CrB, U Her, BL Lac, ER UMa     Nearby Stars (astrometric monitoring) - Barnards Star, 61 Cyg

- All Night session (7.7 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 allowed - Session interrupted by interval of cloud between 02:05 & 03:15 - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 10°C (min) - CCD Temperature:  -10°/-15°C - Notes from 2021-03-29 >>    [ Local Files >> ]   -

AT 2021dbp - Type CV Transient

AT 2021dbp (Auriga) AT 2021dbp (Type: CV) discovered 2021/02/14.535 UT by Gaia Alias: Gaia21auv,  GSC 2374:280  ( Rochester Supernova site |  Gaia21auv ) Based on Gaia Alert at magnitude +10.04

AT 2021dbp - 2021-03-29 (T+43.3d) Image below (2021-03-29.855) was taken 43.3 days after discovery of 2021dbp CV is shown by white cross hairs.  Measured Magnitude +10.89 vs GSC magnitude  +10.2

Annotated CCD Image  (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-29 20:35 UT (#877005-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021dbp on Transients 2021 Page >>

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AT 2021ckv - Type YSO Transient  (GCVS PR Ori)

AT 2021ckv / PR Ori  (Orion) AT 2021ckv (Type: YSO) discovered 2021/02/08.759 UT by Gaia Alias: Gaia21arx, GCVS PR Ori

AT 2021ckv / PR Ori - 2021-03-29 (T+49.1d) Image below (2021-03-29.863) was taken 49.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.07 (vs normal range of +12.2 to +13.6)

Annotated CCD Image  (50% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-29 20:46 UT (#877012-15) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021ckv (PR Ori) on Transients 2021 Page >>

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IC 357 - Spiral Galaxy with AT 2021fyd (unconfirmed)

IC 357 with AT 2021fyd (Taurus) AT 2021fyd (Type: unk) discovered 2021/03/17.187 UT by ZTF Alias: ZTF21aapdpup Discovery Magnitude 18.01 (Rochester Supernova site | TNS 2021fyd )

IC 357 with AT 2021fyd - 2021-03-29 (T+12.7d) Image below (2021-03-29.872) was taken 12.7 days after discovery of 2021fyd Unable to identify transient. It might lay at or very close to  the galaxy' center.  Transient is unconfirmed. Measured Magnitude (nucleus) +14.77

Annotated CCD Image (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-29 21:04 UT (#877021-23) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021fyd (IC 357) on Transients 2021 Page >>

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AT 2021gyc - Type CV Transient

AT 2021gyc (Perseus) AT 2021gyc (Type: CV) discovered 2021/03/19.526 UT by Gaia Alias: Gaia21blz Bright blue gal.plane source rises by 0.2 mag Alerting Magnitude 8.38 (vs historic magnitude 8.62)  ( Rochester Supernova site |  Gaia21blz )

AT 2021gyc (T+10.4d) CV is shown by white cross hairs.

Annotated CCD Image (50% size, linear scale) 2 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-29 21:23 UT (#877031-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021gyc - 2021-03-29 (T+10.4d) Image below (2021-03-29.888) was taken 10.4 days after discovery of 2021gyc CV is shown by white cross hairs.  Measured Magnitude +10.89 (probably underestimated)

Annotated CCD Image  (100% size, linear scale, cropped) 2 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-29 21:23 UT (#877031-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021gyc on Transients 2021 Page >>

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UGC 3502 - Spiral Galaxy with Type Ia Supernova 2021cwc (faded)

UGC 3502 with SN 2021cwc (Camelopardalis) SN 2021cwc (Type Ia, z=0.021) discovered 2021/02/13.381 UT by ATLAS Alias: ATLAS21flz  ( Rochester Supernova site |  Giancarlo Cortini image | Odd Trondal image )

UGC 3502 with SN 2021cwc - 2021-03-29 (T+44.5d) Image below (2021-03-29.894) was taken 44.5 days after discovery of 2021cwc Position of earlier SN (faded / not visible) is shown by white cross hairs.

Annotated CCD Image  (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-29 21:36 UT (#877036-40) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021cwc (UGC 3502) on Supernovae 2021 Page >>

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NGC 3310 - Spiral Galaxy  (Herschel IV-60) with Type II Supernova 2021gmj

NGC 3310 / Herschel IV-60 with SN 2021gmj (Ursa Major) SN 2021gmj (Type: II) discovered 2021/03/20.320 UT by DLT40 Alias: ZTF21aaqgmjt, ATLAS21izq  ( Rochester Supernova site |  Gianluca Masi image)

NGC 3310 with SN 2021gmj - 2021-03-29 (T+9.6d) Image below (2021-03-29.917) was taken 9.6 days after discovery of 2021gmj SN position indicated by white cross-hairs Poor quality image (affected by wind shake/poor seeing)

Annotated CCD Image (100% size, log scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-29 22:13 UT (#877050-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021gmj (NGC 3310) on Supernovae 2021 Page >>

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UGC 5829 - Irregular Galaxy (Spider Galaxy) with Type LBV Transient AT 2021blu

UGC 5829 with LBV 2021blu (Leo Minor) AT 2021blu (Type: LBV) discovered 2021/02/01.467 UT by ATLAS Alias: ATLAS21dic, ZTF21aagppzg  [ Irregular Galaxies ]

UGC 5829 with LBV2021blu - 2021-03-29 (T+56.5d) Image below (2021-03-29.933) was taken 56.5 days after discovery of 2021blu Position of LBV (faint) is indicated by white cross-hairs. Measured magnitude +17.83 (fading)

Annotated CCD Image  (100% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-29 22:32 UT (#877055-57) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of LBV 2021blu  (UGC 5829) on Transients 2021 Page >>

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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 - 2021-03-29 (T+59.4d) Image below (2021-03-29.948) was taken 59.4 days after discovery of 2021biz Postion of SN (faint) shown by white cross hairs.  Measured magnitude +17.25

Annotated CCD Image  (125% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-29 22:52 UT (#877061-64) 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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UGC 5760 - Spiral Galaxy with Type II Supernova 2020zoq

UGC 5760 with SN 2020zoq (Leo) SN 2020zoq (Type II, z=0.0, zhost=0.010040) discovered 2020/11/14.561 by ASAS-SN Discovery Magnitude +17.5 (g-Sloan)  (Rochester Supernova site | Discovery Image | TNS 2020zoq )

UGC 5760 with SN 2020zoq - 2021-03-29 (T+135.4d) Image below (2021-03-29.963) was taken 135.4 days after discovery of 2020zoq Position of earlier SN (not distinguishable) is shown by white cross hairs. Poor quality image (affected by wind shake/poor seeing and uneven sky background)

Annotated CCD Image (125% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-29 23:11 UT (#877068-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 5760 with SN 2020zoq - Earlier Image 2020-11-22 (T+11.7d) Image below (2020-11-26.219) was taken 11.7 days after discovery of SN 2020zoq SN is shown by white cross hairs.   Measured magnitude +15.75

Annotated CCD Image  (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2020-11-26 05:16 UT (#833235-39) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2020zoq (UGC 5760) on Supernovae 2020 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 - 2021-03-29 (T+232.8d) Image below (2021-03-29.978) was taken 232.8 days after discovery of 2020rcq SN (faint) is shown by white cross hairs.   Measured SN magnitude +17.53

Annotated CCD Image (100% size, square root scale, cropped) 3 x 120s exposure (average combine), 3x3 binning, C Filter 2021-03-29 23:37 UT (#877076-78) 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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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 - 2021-03-29 (T+61.9d) Image below (2021-03-29.990) was taken 61.9 days after discovery of 2021bgi Transient/Galaxy nucleus is shown by white cross hairs.  Combined magnitude +15.61 (fading ?)

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-29 23:56 UT (#877081-85) 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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Nova Per 2020 - Nova (V1112 Per, AT 2020abap)

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 AT 2020abap (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 - 2021-03-30 (T+124.2d) Image below (2021-03-30.006) was taken 124.2 days after discovery of Nova Nova is shown by white cross hairs.   Measured magnitude +14.48

CCD Image (100% size, linear scale, cropped) 4 x 90s exposure (average combine), 3x3 binning, C Filter 2021-03-30 00:13 UT (#877088-92) 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 3515 - Spiral Galaxy with Possible Transient AT 2021fmd

NGC 3515 with AT 2021fmd (Leo Minor) AT 2021fmd (Type: unk) discovered 2021/03/12.290 UT by ASAS-SN Alias: ASASSN-21de Discovery Magnitude 17.3 (ABMag vs Limiting flux: 17.5)  ( Rochester Supernova site | TNS 2021fmd )

NGC 3515 with AT 2021fmd - 2021-03-30 (T+17.7d) Image below (2021-03-30.017) was taken 17.7 days after discovery of 2021fmd No definate confirmation of transient object it may be faint or very close to galaxy nucleus Measured magnitude + 15.36 (nucleus+transient)

Annotated CCD Image  (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-30 00:35 UT (#877096-99) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021fmd (NGC 3515) on Transients 2021 Page >>

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MCG +6-30-84 - Galaxy (PGC 48870) with Type Ia Supernova 2021K

MCG +6-30-84 / PGC 48870 with SN 2021K (Canes Venatici) MCG +6-30-84 / Alias SN 2021K (Type: Ia) discovered 2021/01/01.490 UT by ZTF  Alias: ZTF21aaabvjk, Gaia21acj  (Rochester Supernova site | ZTF observations | )

MCG +6-30-84 with SN 2021K - 2021-03-30 (T+87.5d) Image below (2021-03-30.034) was taken 87.5 days after discovery of 2021K SN is shown by white cross hairs.  Measured magnitude +15.29 (SN + Galaxy Centre) (steady) vs  Host Galaxy Catalog Mag +15.29

Annotated CCD Image  (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-30 00:58 UT (#877102-06) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021K (MCG +6-30-84) 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 - 2021-03-30 (T+59.6d) Image below (2021-03-30.119) was taken 59.6 days after discovery of 2021biy Position of earlier LRN (not distinguishable/not visible) is shown by white cross hairs.

Annotated CCD Image  (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-30 03:00 UT (#877140-44) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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

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C/2020 T2 (Palomar) - Comet

C/2020 T2 (Palomar) (passing through Canes Venatici) Sun Distance 2.39 AU (approaching) Earth Distance 1.56 AU (233.7 million km) Comet indicated by white cross-hairs		C/2020 T2 (Palomar) - 2021-03-30, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -14.25 arcsec/hr, Dec 8.20 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-03-30 03:13 UT (#877148-50) 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) 15 x 45s exposure (average combine), 3x3 binning, C Filter 2021-03-30 03:18 UT (#877148-62) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2020 T2 (Palomar) on Comets 2021 Page >>

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7P/Pons-Winnecke - Comet

7P/Pons-Winnecke (passing through Serpens) Sun Distance 1.42 AU (approaching) Earth Distance 0.83 AU (124.0 million km) Expected position of comet shown by white circle		7P/Pons-Winnecke - 2021-03-30, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 114.49 arcsec/hr, Dec -8.63 arcsec/hr) Comet is indicated by white cross-hairs.
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-03-30 03:41 UT (#877173-76) 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) 4 x 45s exposure (average combine), 3x3 binning, C Filter 2021-03-30 03:41 UT (#877173-77) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 7P/Pons-Winnecke on Comets 2021 Page >>

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AT 2021hdk - CV Type Transient

AT 2021hdk (Ophiuchus) AT 2021hdk (Type: CV) discovered 2021/03/25.862 UT by XOSS Alias: XM64HT Discovery Magnitude 15.71  ( Rochester Supernova site |  TNS 2021hdk )

AT 2021hdk (T+4.3d) Reported CV transient (faint) is shown by white cross hairs.

Annotated CCD Image (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-30 04:00 UT (#877190-94) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021hdk - 2021-03-30 (T+4.3d) Image below (2021-03-30.165) was taken 4.3 days after discovery of 2021hdk Reported CV transient (faint) is shown by white cross hairs.  Measured Magnitude +16.10

Annotated CCD Image (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-30 04:00 UT (#877190-94) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021hdk - Ref Image No indication of any object at the position of the reported transient  (shown by mauve cross-hairs)

Reference Image DSS2

Images of AT 2021hdk on Transients 2021 Page >>

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