David's Astronomy Pages CCD Images - Session 915 (2021-09-21)

Images (S914)

Images Main

Home Page

Images (S916)

Objects

Session Notes

10P/Tempel - Comet  (Attempt) 17P/Holmes - Comet 67P/Churyumov-Gerasimenko - Comet C/2019 L3 (ATLAS) - Comet     Nova Per 2020 - Nova (V1112 Per, AT2020abap) Nova Cas 2021 - Nova (V1405 Cas)     AT2021wkx - Unconfirmed Transient in Galaxy WISEA J165817.77+644220.4 (PGC 2670810) AT 2021yjl - CV Type Transient (Attempt)      IC 357 - Spiral Galaxy with AT2021fyd (unconfirmed) LEDA 2204848 - Galaxy with Type Ia Supernova 2021umh     NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl NGC 1166 - Spiral Galaxy with Type II Supernova 2021zby NGC 6184 - Spiral Galaxy with Type Ia Supernova 2021wkv NGC 6500 - Spiral Galaxy with Type Ia Supernova 2021wuf     SN 2021gmh - Type Ia Supernova in SDSS J223433.36+340019.1     UGC 1977 - Spiral Galaxy with Transient AT 2021irz UGC 2605 - Irregular Galaxy with Type II Supernova 2021wvw UGC 3240 - Spiral Galaxy with Type Ia Supernova 2021vau      Variable Stars (photometric monitoring) - TT Ari, CI Cyg, S Cyg, SS Cyg, KIC 8462852, BL Lac, CY Lyr, RR Lyr, DY Per, GK Per      Nearby Stars (astrometric monitoring) - HH And, Barnards Star, DX Cnc, 61 Cyg, Groombridge 34, EV Lac, Teegardens Star

- Full night Session (8.8 hours). - Clear skies all night but poor seeing and moonlit - Main aims of the session were to acquire a selection of targets including  Comet 67P/Churyumov-Gerasimenko - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 12°C (min) - CCD Temperature:  -10°C - Notes from 2021-09-21 >>    [ Local Files >> ]   -

10P/Tempel - Comet (Attempted Sighting)

10P/Tempel  (passing through Orion) Sun Distance 2.24 AU Earth Distance 1.76 AU (262.7 million km) Expected position of comet shown by white circle No indication of comet (too faint ?)		10P/Tempel - 2021-09-22, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 12.75 arcsec/hr, Dec -7.96 arcsec/hr) No indication of comet at its expected position.
Annotated CCD Image (50% size, square root scale) 7 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-22 04:09 UT (#915356-62) 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 left
Images of 67P/Churyumov-Gerasimenko on Comets 2021 Page >>

Back to Top

17P/Holmes - Comet

17P/Holmes - 2021-09-22 (passing through Auriga) Sun Distance 2.62 AU (receeding) Earth Distance 2.38 AU (356.2 million km) Comet's expected position is shown by white circle		17P/Holmes - 2021-09-22, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 38.76 arcsec/hr, Dec 15.48 arcsec/hr) Comet (very faint) shown by white circle
Annotated CCD Image (50% size, square root scale) 2 x 60s exposure (average combine), 3x3 binning, C Filter 2021-09-22 00:52 UT (#915213-14) 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) 8 x 60s exposure (average combine), 3x3 binning, C Filter 2021-09-22 00:56 UT (#915213-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 15P/Holmes on Comets 2021 Page >>
Earlier images of 15P/Holmes on Comets 2007 Page >>

Back to Top

67P/Churyumov-Gerasimenko - Comet

67P/Churyumov-Gerasimenko (passing through Taurus) Sun Distance 1.31 AU Earth Distance 0.55 AU (82.0 million km)		67P/Churyumov-Gerasimenko - 2021-09-22, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 154.55 arcsec/hr, Dec 41.33 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-22 02:02 UT (#915247-49) 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)  15 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-22 02:07 UT (#915247-61) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 67P/Churyumov-Gerasimenko on Comets 2021 Page >>

67P/Churyumov-Gerasimenko - False Colour Image(s)  Inverse Spectrum

67P/Churyumov-Gerasimenko - 2021-09-22

False Colour CCD Image (70% size, square root scale)  15 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-22 02:07 UT (#915247-61) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Back to Top

C/2019 L3 (ATLAS) - Comet

C/2019 L3 (ATLAS) - 2021-09-22 (passing through Auriga Sun Distance 3.69 AU (approaching) Earth Distance 3.83 AU (573.0 million km)		C/2019 L3 (ATLAS) - 2021-09-22, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 38.07 arcsec/hr, Dec -12.16 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 2 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-22 03:31 UT (#915308-09) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		CCD Image (100% size, log scale, cropped) 9 x 45s exposure (average combine), 3x3 binning, C Filter 2021-09-22 03:35 UT (#915308-16) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2019 L3 (ATLAS) on Comets 2021 Page >>

Back to Top

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 - 2021-09-22 (T+300.2d) Image below (2021-09-22.025) was taken 300.2 days after discovery of nova Nova is shown by white cross hairs.  Measured magnitude +15.4 (falling slowly)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 90s exposure (average combine), 3x3 binning, C Filter 2021-09-22 00:41 UT (#915205-09) 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 >>

Back to Top

Nova Cas 2021 - Nova (V1405 Cas)

Nova Cas 2021 (Cassiopeia) Nova in Cassiopeia discovered 2021-03-18.4236,  by Yuji Nakamura (Japan) Magnitude at discovery +9.6 (unfiltered CCD) AT2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia Alias: Gaia21bpe, AT2021hkn, V1405 Cas

Nova Cas 2021 / AT2021hkn - 2021-09-22 (T+187.7d) Image below (2021-09-22.135) was taken 187.7 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +7.74 Note: star object is saturated and shows some blooming, mag is probably underestimated (linked with Detection Threshold = 50)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-09-22 03:15 UT (#915291-95) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2021-09-22 (T+187.7d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 30s exposure (average combine), 2x2 binning, S Filter 2021-09-22 03:18 UT (#915296-300) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Cas 2021 on Novae Page >>

Back to Top

AT 2021wkx - M Dwarf Type Transient in WISEA Galaxy (PGC 2670810)

AT 2021wkx (Draco) Alias: In WISEA J165817.77+644220.4 AT 2021wkx (Type: M Dwarf) discovered 2021-08-20.027 UT by MASTER Alias: MASTER OT J165819.02+644213.9 Discovery Magnitude 16.6 (Clear Filter)  (Rochester Supernova site | TNS 2021wkx )

WISEA J165817.77+644220.4 - Galaxy Alias : PGC 2670810

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-21 20:45 UT (#915045-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021wkx - 2021-09-21 (T+32.8d) Image below (2021-09-21.858) was taken 32.8 days after discovery of 2021wkx Position of reported transient (not visible) 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 2021-09-21 20:45 UT (#915045-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021wkx (in WISEA Galaxy) on Transients 2021 Page >>

Back to Top

AT 2021yjl - CV Type Transient (Attempt)

AT 2021yjl (Draco) AT 2021yjl (Type: CV) discovered 2021-09-06.981 UT by Gaia Alias: Gaia21eem Discovery Magnitude 15.25 (G-Gaia Filter) vs Historic Magnitude 17.92 +/- 1.15 SD Outburst of known CV 1RXS J185310.0+594509 ( TNS 2021yjl | Gaia21eem )

AT 2021yjl - 2021-09-21 (T+14.9d) Image below (2021-09-21.918) was taken 14.9 days after discovery of 2021yjl Position of reported transient (not visible) is indicated by white cross-hairs Non-Detection Limiting Magnitude +18.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-09-21 22:04 UT (#915115-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021yjl - 2021-09-21 (T+14.9d), Detail Position of reported transient (not visible) is indicated by black cross-hairs

Annotated negative CCD Image (100% size, square root scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-09-21 22:04 UT (#915115-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021yjl on Transients 2021 Page >>

Back to Top

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 - 2021-09-22 (T+188.9d) Image below (2021-09-22.063) was taken 188.9 days after discovery of 2021fyd Position of reported transient (not separately distinguishable) is shown by white cross-hairs Measured Magnitude (nucleus +SN) +14.62 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-22 01:38 UT (#915232-36) 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 >>

Back to Top

LEDA 2204848 - Galaxy with Type Ia Supernova 2021umh (Attempt)

LEDA 2204848 with SN2021umh (Andromeda) SN 2021umh (Type: Ia) discovered 2021-08-01.449 UT by ZTF Alias: ZTF21abqikvn Discovery mag +18.64  ( Rochester Supernova site | TNS 2021umh )  [ Supernovae ]

LEDA 2204848 with SN 2021umh - 2021-09-22 (T+51.6d) Image below (2021-09-22.097) was taken 51.6 days after discovery of 2021umh Position of reported SN (not separately distinguishable) is shown by white cross hairs. Measured magnitude +15.80 (gal. nucleus + SN)

CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-22 02:28 UT (#915265-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021umh (LEDA 2204848) on Supernovae 2021 Page >>

Back to Top

NGC 940 - Spiral Galaxy with Type Ia Supernova 2021vtl

NGC 940 with SN2021vtl (Triangulum) SN 2021vtl (Type: Ia) discovered 2021-08-11.930 UT by XOSS Alias: PSP21D, Gaia21duk, PSN J02292803+3138385 Discovery Magnitude 17.3 (Clear Filter) vs Prior Non-Detection Limiting Magnitude 18.0 Confirmed SN Ia  ( TNS 2024ivo | Gaia21duk )

NGC 940 with SN 2021vtl - 2021-09-22 (T+41.1d) Image below (2021-09-22.011) was taken 41.1 days after discovery of 2021vtl SN (faint) 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 2021-09-22 00:25 UT (#915199-203) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021vtl (NGC 940) on Supernovae 2021 Page >>

Back to Top

NGC 1166 - Spiral Galaxy with Type II Supernova 2021zby

NGC 1166 with SN 2021zby (Aries) SN 2021zby (Type: II) discovered 2021-09-17.453 UT by ATLAS Alias: ATLAS21bixf  (Rochester Supernova site | Enrico Prosperi image )

NGC 1166 with SN 2021zby - 2021-09-21 (T+4.5d) Image below (2021-09-21.987) was taken 4.5 days after discovery of 2021zby Position of supernova (faint) is shown by white cross-hairs Poor quality image (poor transparency, low S/N)

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-21 23:49 UT (#915182-86) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021zby (NGC 1166) on Supernovae 2021 Page >>

Back to Top

NGC 6184 - Spiral Galaxy with Type Ia Supernova 2021wkv

NGC 6184 with SN 2021wkv (Hercules) SN 2021wkv (Type: Ia, zhost=0.027329) discovered 2021/08/20.277 UT by ATLAS Alias: ATLAS21bgqy.  Magnitude +18.2 at discovery  (Rochester Supernova site )

NGC 6184 with SN 2021wkv - 2021-09-21 (T+32.6d) Image below (2021-09-21.831) was taken 32.6 days after discovery of 2021wkv SN position is shown by white cross-hairs. Measured mag ? (unable to resolve SN in CCDSoft/SExtractor)

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-21 20:05 UT (#915009-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021wkv (NGC 6184) on Supernovae 2021 Page >>

Back to Top

NGC 6500 - Spiral Galaxy with Type Ia Supernova 2021wuf

NGC 6500 with SN2021wuf (Hercules) SN 2021wuf (Type: Ia) discovered 2021-08-23.372 UT by ATLAS Alias: ATLAS21bgsc  (Rochester Supernova site | Mantero Andrea image )

NGC 6500 with SN 2021wuf - 2021-09-21 (T+29.5d) Image below (2021-09-21.874) was taken 29.5 days after discovery of 2021wuf SN position (faint but distinct) is shown by white cross-hairs. Measured Magnitude +15.10 (Clear Filter)

Annotated CCD Image  (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-21 21:06 UT (#915052-56) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021wuf (NGC 6500) on Supernovae 2021 Page >>

Back to Top

SN 2021gmh - Type Ia Supernova in SDSS J223433.36+340019.1

SDSS J223433.36+340019.1 with SN 2021gmh (Pegasus) SN 2021gmh (Type: Ia) discovered 2021/03/19.536 UT by ZTF Alias: ZTF21aaqftpz  (Rochester Supernova site )

SN 2021gmh - 2021-09-21 (T+186.4d) Image below (2021-09-21.967) was taken 186.4 days after discovery of 2021gmh Galaxy with Supernova (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 2021-09-21 23:20 UT (#915165-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021gmh (SDSS J223433.36+340019.1) on Supernovae 2021 Page >>

Back to Top

UGC 1977 - Spiral Galaxy with Transient AT 2021irz

UGC 1977 with AT 2021irz (Andromeda) AT 2021irz (Type: unk) discovered 2021/04/07.539 UT by Gaia Alias: Gaia21bsj Discovery Magnitude 17.89 (G-Gaia Filter) Candidate SN in galaxy UGC 1977 (never classified/confirmed) The gsaweb web page for Gaia21bsj shows that transient reached mag +17.8 on 2021-04-07 before fading to +20.9 by 2021-07-05 ( TNS 2021irz | Gaia21bsj )

UGC 1977 - Spiral Galaxy

Annotated CCD Image  (50% size, square root scale) 3 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-09 22:53 UT (#932117-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 1977 with AT 2021irz - 2021-09-22 (T+167.6d) Image below (2021-09-22.113) was taken 167.6 days after discovery of 2021irz Position of earlier tranisent (not visible) is shown by white cross-hairs. Non-Detection Limiting Magnitude +19.0 (Clear Filter)

Annotated CCD Image (175% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-22 02:51 UT (#915274-78) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021irz (in UGC 1977) on Transients 2021 Page >>

Back to Top

UGC 2605 - Irregular Galaxy with Type II Supernova 2021wvw

UGC 2605 with SN2021wvw (Perseus) SN 2021wvw (Type: II, z=0.009944) discovered 2021-08-24.606 UT by PS1 Alias: PS21jnb Host Alias : PGC 12073  (Rochester Supernova site )

UGC 2605 with SN 2021wvw - 2021-09-22 (T+28.4d) Image below (2021-09-22.047) was taken 28.4 days after discovery of 2021wvw Position of SN (faint, fading) shown by white cross-hairs Measured magnitude +17.80 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-22 01:16 UT (#915224-28) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021wvw (UGC 2605) on Supernovae 2021 Page >>

Back to Top

UGC 3240 - Spiral Galaxy with Type Ia Supernova 2021vau

UGC 3240 with SN2021vau (Orion) SN 2021vau (Type: Ia, z=0.036) discovered 2021/08/04.610 UT by ASAS-SN Alias: ASASSN-21ou, Gaia21dzq Host Alias : PGC 16668 (catalog mag +15.5)  (Rochester Supernova site | Discovery image | Gaia21dzq )

UGC 3240 with SN 2021vau - 2021-09-22 (T+48.6d) Image below (2021-09-22.179) was taken 48.6 days after discovery of 2021vau Supernova position (v. close to galaxy centre) shown by white indicator line Measured Magnitude  (SN + Host Nucleus) +15.55 (Clear Filter)

CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-09-22 04:27 UT (#915366-70) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021vau (UGC 3240) on Supernovae 2021 Page >>

Back to Top