David's Astronomy Pages CCD Images - Session 864 (2021-02-26)

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156P/Russell-LINEAR - Comet     AT 2021ckv - Type YSO Transient  (GCVS PR Ori) AT 2021dbp - Type CV Transient     NGC 304 - Spiral Galaxy with Type Ia Supernova 2021dnn     UGC 1436 - Spiral Galaxy with Type Ia Supernova 2021nv UGC 2505 - Irregular Galaxy with Type II Supernova 2021bge UGC 3502 - Spiral Galaxy with Type Ia Supernova 2021cwc     Variable Stars (photometric monitoring) - RX And, SY Cnc, FU Ori, RR Tau     Nearby Stars (astrometric monitoring) - LAMOST-HVS1, Scholz's Star

- Evening session (3.6 hours) - Main aims of the session were to acquire a selection of variable star, nearby star and comet targets and deep sky targets as conditions allowed. - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 1°C (min) - CCD Temperature:  -20°C - Notes from 2021-02-26 >>    [ Local Files >> ]   -

156P/Russell-LINEAR - Comet

156P/Russell-LINEAR (passing through Perseus) Sun Distance 1.75 AU  (receeding) Earth Distance 1.47 AU (219.2 million km)		156P/Russell-LINEAR - 2021-02-26  Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 117.50 arcsec/hr, Dec 11.49 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-02-26 19:59 UT (#864020-22) 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 2021-02-26 20:01 UT (#864020-28) 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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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 [ Gaia21arx ] [ YSO Transients ]

AT 2021ckv / PR Ori - 2021-02-26 (T+18.1d) Image below (2021-02-26.872) was taken 18.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.6 (fading) (vs normal range of +12.2 to +13.6)

Annotated CCD Image  (50% size, linear scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-26 21:06 UT (#864055-59) 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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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 - 2021-02-26 (T+12.4d) Image below (2021-02-26.944) was taken 12.4 days after discovery of 2021dbp CV is shown by white cross hairs.  Measured Magnitude +10.90 (flat ?) vs GSC magnitude  +10.2

Annotated CCD Image  (100% size, linear scale, cropped) 2 x 60s exposure (average combine), 3x3 binning, C Filter 2021-02-26 22:44 UT (#864122-23) 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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NGC 304 - Spiral Galaxy with Type Ia Supernova 2021dnn

NGC 304 with SN 2021dnn (Andromeda) [ Supernovae 2021 ] SN 2021dnn (Type: Ia) discovered 2021/02/22.225 UT by ATLAS Magnitude +18.3 at discovery Alias: ZTF21aabpszb, Gaia21adm  (Rochester Supernova site | TNS | )

NGC 304 with SN 2021dnn - 2021-02-26 (T+4.6d) Image below (2021-02-26.801) was taken 4.6 days after discovery of 2021dnn SN position is shown by white cross hairs.  (unable to resolve SN using sextractor)

Annotated CCD Image  (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-26 19:23 UT (#864004-08) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021dnn (NGC 304) on Supernovae 2021 Page >>

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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 - 2021-02-26 (T+50.6d) Image below (2021-02-26.816) was taken 50.6 days after discovery of 2021nv SN position is shown by white cross hairs.

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-26 19:45 UT (#864012-16) 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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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 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 SN 2021bge - 2021-02-26 (T+30.3d) Image below (2021-02-26.858) was taken 30.3 days after discovery of 2021bge SN position is shown by white circle  Measured Magnitude ? Poor quality image (SN poorly resolved )

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-26 20:44 UT (#864048-52) 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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UGC 3502 - Spiral Galaxy with Type Ia Supernova 2021cwc

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 - 2021-02-26 (T+13.5d) Image below (2021-02-26.923) was taken 13.5 days after discovery of 2021cwc SN is shown by white cross hairs.    Measured Mag ? (unable to resolve SN properties using sextractor)

Annotated CCD Image  (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-02-26 22:19 UT (#864099-103) 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 >>

Satellite crossing directly over SN 2021cwc in UGC 3502

Annotated CCD Image  (100% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-02-26 22:19 UT (#864101) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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