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CCD Images - Session 935 (2021-11-19)
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Nova Cas 2021 - Nova (V1405 Cas) AT2021aetv - Type CV Transient (Unconfirmed) NGC 9 - Spiral Galaxy with Type Ib Supernova 2021zju NGC 327 - Spiral Galaxy with Type Ia Supernova 2021aclv ? NGC 7501 - Elliptical Galaxy with Type Ia Supernova 2021wyw UGC 5751 - Spiral Galaxy with Type Ibn Supernova 2021abcw WISEA J225919.46+142923.7 - Galaxy with Transient AT2021kku Variable Stars (photometric monitoring) - RX And, U And, CY Aqr, SS Cyg, BL Lac, RR Lyr, Nearby Stars (astrometric monitoring) - 61 Cyg, Groombridge 34
- Evening session 8.5 hours - Cloud developed around 22:00 and effectively ended the session early, part from a semi-clear spot around 03:15. - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 1.5°C (min) - CCD Temperature: -20°C - Notes from 2021-11-19 >> [ Local Files >> ]
| 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 - 2021-11-19 (T+246.3d) Image below (2021-11-19.749) was taken 246.3 days after discovery of Nova Nova is shown by white cross hairs. Measured magnitude +8.64 (linked with Detection Threshold = 50) |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, C Filter 2021-11-19 18:01 UT (#935009-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Nova Cas 2021 (V1405 Cas) Spectra - 2021-11-19 (T+246.3d) |
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| Spectra produced in AstroMain using Image taken with Star Analyser
200 5 x 30s exposure (average combine), 2x2 binning, S Filter 2021-11-19 18:04 UT (#935014-18) 12" LX200R (at f/10.4) + ST-10XME |
| Images of Nova Cas 2021 on Novae Page >> |
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| AT2021aetv (Pisces) AT2021aetv (Type: CV) discovered 2021-11-12.220 UT by Robert Nelson Alias: RHN-001, GSC 0015-0388 |
| AT2021aetv - 2021-11-19 (T+7.7d) Image below (2021-11-19.917) was taken 7.7 days after discovery of AT2021aetv AT2021aetv is shown by white cross-hairs Measured magnitude +11.4 vs GCS 15:388 catalog mag +11.5 and UCA/USNO2 catalog mag +11.4 No indication of any significant brightning. The transient is therefore again unconfirmed. Star would seem to have returned to normal state |
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| Annotated CCD Image (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-19 22:03 UT (#935180-84) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
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| NGC 9 with SN2021zju (Pegasus) SN 2021zju (Type: Ib) discovered 2021-09-24.483 UT by ATLAS Alias: ATLAS21bjbm, ZTF21acdxhuv (Rochester Supernova site | Enrico Prosperi image ) |
| NGC 9 with SN2021zju - 2021-11-19 (T+56.4d) Image below (2021-11-19.879) was taken 56.4 days after discovery of 2021zju Position of earlier supernova is shown by white cross-hairs |
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| Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-19 21:14 UT (#935130-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2021zju (NGC 9) on Supernovae 2021 Page >> |
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| NGC 327 with SN SN2021aclv (Cetus) SN 2021aclv (Type: Ia) discovered 2021-10-30.214 UT by ZTF Alias: ZTF21acjeegy (Rochester Supernova site ) |
| NGC 327 with SN2021aclv - 2021-11-19 (T+20.6d) Image below (2021-11-19.851) was taken 20.6 days after reported discovery of 2021aclv Supernova's reported position is shown by white cross-hairs It is not possible to demonstrate presence of SN as it is too close to the host galaxy's nucleus and too dim Measured magnitude +15.2 (nucleus + SN) vs Host Galaxy catalog mag (+13.5 or +14.1) & SN reported magnitude at discovery (+17.3) The bright object lying above the galaxy is confirmed to be a star (Aladin) |
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| Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-19 20:36 UT (#935109-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN2021aclv (NGC 327) on Supernovae 2021 Page >> |
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| NGC 7501 with SN 2021wyw (Pisces) SN 2021wyw (Type: Ia) discovered 2021-08-25.315 UT by ZTF Alias: ZTF21abvicne Discovery Magnitude 19.47 (r-ZTF Filter) (Rochester Supernova site | Gianluca Masi image | Enrico Prosperi image ) ( TNS 2021wyw ) |
| NGC 7501 with adjacent galaxies including NGC 7501 (catalog mag + 14.9), NGC 7499 (catalog mag +14.4) NGC 7503 (catalog mag +14.5) & numerous PGC galaxies |
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| Annotated CCD Image (70% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-19 20:04 UT (#935092-96) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| NGC 7501 with SN 2021wyw - 2021-11-19 (T+86.5d) Image below (2021-11-19.830) was taken 86.5 days after discovery of 2021wyw Position of reported SN in shown by white cross-hairs No indication of object at earlier position SN is assumed to have faded |
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| Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-19 20:04 UT (#935092-96) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2021wyw (NGC 7501) on Supernovae 2021 Page >> |
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| UGC 5751 with SN2021abcw (Leo) SN 2021abcw (Type: Ibn) discovered 2021-10-11.480 UT by ASAS-SN Alias: ASASSN-21td, Gaia21ewv Discovery Magnitude 17.2 (g-Sloan Filter) vs Prior Non-Detection Limiting Magnitude 17.5 Gaia, 2021-10-26 06:06:32, Mag 18.60 Gaia, 2021-11-19 13:50:35, Mag 19.95 (Rochester Supernova site | Discovery Image ) ( TNS 2021abcw | Gaia21ewv ) |
| UGC 5751 with SN2021abcw - 2021-11-20 (T+39.7d) Image below (2021-11-20.135) was taken 39.7 days after discovery of 2021abcw Poor quality low signal-to-noise image (cloud & single frame). Earlier SN position shown by white cross-hairs |
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| Annotated CCD Image (150% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-11-20 03:17 UT (#935199) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of SN 2021abcw (UGC 5751) on Supernovae 2021 Page >> |
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| AT 2021aesn (Cetus) AT 2021aesn (Type: CV) discovered 2021-11-14.136 UT by Gaia Alias: Gaia21fec Discovery magnitude 14.59 (G-Gaia) vs Historic Mag 20.67 5.5 mag outburst in CV candidate ASASSN-13bd CV had fallen back to mag 20.60 on 2021-12-19 (T+35d) A further outburst was recorded by Gaia approximately one year later ( 2022-12-29, mag 14.62) ( TNS 2021aesn | Gaia21fec ) |
| AT 2021aesn - 2021-11-19 (T+5.7d) Image below (2021-11-19.845) was taken 5.7 days after discovery of 2021aesn Position of reported transient (not visible) is shown by white cross-hairs [ Gaia Measurements (below) indicate that CV Candidate had dimmed back to historic levels by T+35.5d But with no measurements between T+0.25d and T35.5d there is uncertainity over the rate at which the CV Candidate dimmed. From the image below it is likely that star had returned to close to historic level by T+5.7d and this indicates that the dimming was fairly quick. 2021-11-02 03:09:55 UT, mag 20.86 (T-12.0d) 2021-11-14 03:16:36 UT, mag 14.59 (T+0.00d) 2021-11-14 05:03:10 UT, mag 14.54 (T+0.07d) 2021-11-14 09:16:49 UT, mag 14.66 (T+0.25d) 2021-12-19 14:39:53 UT, mag 20.60 (T+35.5d) ] |
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| Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-11-19 20:20 UT (#935101-05) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| Images of AT 2021aesn on Transients 2021 Page >> |
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| WISEA J225919.46+142923.7 (Pegasus) AT2021kku (Type: unk) discovered 2021/04/23.417 UT by ASAS-SN Alias: ASASSN-21gp, Gaia21can Mag +16.81 at discovery, Faded to +19.9 by 2021-07-31 (Rochester Supernova site | Gaia21can ) |
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| Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-11-19 19:42 UT (#935083-87) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2 |
| WISEA J225919.46+142923. - 2021-11-19 (T+210.4d) Image below (2021-11-19.815) was taken 210.4 days after discovery of 2021kku (No indication of earlier transient, position shown by black cross-hairs, which has now faded to below mag +20) |
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| Annotated Negative CCD Image (125% size, square root scale, cropped) Image details as above |
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| This Web Page: | CCD Images - Session 935 (2021-11-19) |
| Last Updated : | 2024-06-17 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
