David's Astronomy Pages Images - Session 1200 (2024-03-21)

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Session Notes

62P/Tsuchinshan - Comet     AT 2022xij - CV Type Transient AT 2023tki - Type XRB Transient AT 2023tsk - Type BL Transient AT 2023txn - CV Type Transient AT 2024crd - Type Nova? Transient AT 2024dsj - CV Type Transient AT 2024epa - CV Type Transient     NGC 4619 - Spiral Galaxy with Type II Supernova 2024drt     UGC 8630 - Spiral Galaxy with Type II Supernova 2024drv UGC 11858 - Spiral Galaxy with Type Ia Supernova 2023rjj (non-detection)     Variable Stars (photometric monitoring) - BL Lac, U Her      Nearby Stars (astrometric monitoring) - Groombridge 34

- Evening Session (2.1 hrs) . Session ended when sky clarity reduced and clouds developed     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 4°C (min) - CCD Temperature:   -20°C - Notes from 2024-03-21 >>     -

Observing Result

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62P/Tsuchinshan - Comet

62P/Tsuchinshan - 2024-03-22 (passing through Virgo) Sun Distance 1.63 AU (receeding) Earth Distance 0.64 AU (95.3 million km)		62P/Tsuchinshan - 2024-03-22 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -32.08 arcsec/hr, Dec -4.78 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 90s exposure (average combine), 3x3 binning, Clear Filter 2024-03-22 01:05 UT (#1200012-14) 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) 6 x 90s exposure (average combine), 3x3 binning, Clear Filter 2024-03-22 01:08 UT (#1200012-18) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of 62P/Tsuchinshan on Comets 2023 Page >>
Images of 62P/Tsuchinshan on Comets 2024 Page >>

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AT 2022xij - CV Type Transient

AT 2022xij (Sagitta) AT 2022xij (Type: CV) discovered 2022-10-09.998 UT by MASTER Alias: MASTER OT J190926.97+191224.1 Discovery Magnitude 13.5 (Clear Filter)  ( TNS 2022xij )

AT 2022xij - 2024-03-22 (T+529.1d) Image below (2024-03-22.110) was taken 529.1 days after discovery of 2022xij Position of reported transient (faint) is shown by white cross-hairs Measured magnitude +15.45 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-03-22 02:41 UT (#1200050-54) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2022xij - Earlier Image 2022-10-13 (T+3.9d) Image below (2022-10-13.944) was taken 3.9 days after discovery of 2022xij Position of reported transient (bright) is shown by white cross-hairs Measured magnitude +13.27 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 2 x 60s exposure (average combine), 3x3 binning, Clear Filter 2022-10-13 22:40 UT (#1046016-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022xij on Transients 2022 Page >>

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AT 2023tki - Type XRB Transient

AT 2023tki (Scutum) AT 2023tki (Type: XRB) discovered 2023-09-19.776 UT by Gaia Alias: Gaia23cnv Discovery Magnitude 11.49 (G-Gaia Filter) vs Historic Magnitude 11.94 +/- 0.07 SD ~0.5 mag rise in Gaia source, aka HMXRB ATO XRB = X-Ray Binary  ( TNS 2023tki | Gaia23cnv )

AT 2023tki - 2024-03-22 (T+184.4d) Image below (2024-03-22.186) was taken 184.4 days after discovery of 2023tki Position of reported transient (bright) is shown by white cross-hairs Measured magnitude +12.08 (Clear Filter) Likely faded back to historic level

Annotated CCD Image (100% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2024-03-22 04:28 UT (#1200113) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023tki on Transients 2023 Page >>

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AT 2023tsk - Type BL Transient

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AT 2023txn - CV Type Transient

AT 2023txn (Cygnus) AT 2023txn (Type: CV) discovered 2023-09-29.797 UT by Gaia Alias: Gaia23cse Discovery magnitude 11.83 (G-Gaia) vs Historic Mag 13.14 Red Galactic plane source brightens erratically by 2 mag & becomes bluer  ( TNS 2023txn | Gaia23cse )

AT 2023txn - 2024-03-22 (T+174.3d) Image below (2024-03-22.126) was taken 174.3 days after discovery of 2023txn Position of reported transient (distinct but fading) is shown by white cross-hairs Measured magntitude +12.79 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-03-22 03:04 UT (#1200064-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023txn on Transients 2023 Page >>

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AT 2024crd - Type Nova? Transient

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AT 2024dsj - CV Type Transient

AT 2024dsj (Cassiopeia) AT 2024dsj (Type: CV) discovered 2024-02-28.787 UT by Gaia Alias: Gaia24ath Discovery Magnitude 15.25 (G-Gaia Filter) vs Historic Magnitude 15.03 +/- 0.02 SD  Gaia source fades by 0.2 mag TNS discovery report on TNS says Prior Non-Detection Limiting Mag 21.5 (2024-01-25 17:32) but Gaia data for the same date gives mag 15.26)  ( TNS 2024dsj | Gaia24ath)

AT 2024dsj - 2024-03-22 (T+22.4d) Image below (2024-03-22.142) was taken 22.4 days after discovery of 2024dsj Position of reported transient (faint) is shown by white cross-hairs Measured Magnitude +14.49 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-03-22 03:28 UT (#1200079-82) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024dsj on Transients 2024 Page >>

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AT 2024epa - CV Type Transient

AT 2024epa (Aquila) AT 2024epa (Type: CV) discovered 2024-03-15.507 UT by Gaia Alias: Gaia24azt Discovery Magnitude 13.72 (G-Gaia Filter) vs Historic Magnitude 13.93 +/- 0.03 SD  ~0.3 mag rise in Gaia source  ( TNS 2024epa | Gaia24azt )

AT 2024epa - 2024-03-22 (T+6.6d) Image below (2024-03-22.117) was taken 6.6 days after discovery of 2024epa Position of reported transient (faint) is shown by white cross-hairs Measured Magnitude +13.84 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-03-22 02:52 UT (#1200057-61) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024epa on Transients 2024 Page >>

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NGC 4619 - Spiral Galaxy with Type II Supernova 2024drt

NGC 4619 with SN 2024drt (Canes Venatici) SN 2024drt (Type: II) discovered 2024-03-02.486 UT by ATLAS Alias: ATLAS24dcr, ZTF24aagmhtq Discovery Magnitude 17.93 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Mag 18.46 (g-ZTF Filter)  ( TNS 2024drt )

NGC 4619 with SN 2024drt - 2024-03-22 (T+19.6d) Image below (2024-03-22.063) was taken 19.6 days after discovery of 2024drt Position of reported SN (distinct) is indicated by white cross-hairs. Estimated Magnitude +15.5 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-03-22 01:39 UT (#1200028-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024drt (in NGC 4619) on Supernova 2024 Page >>

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UGC 8630 - Spiral Galaxy with Type II Supernova 2024drv

UGC 8630 with SN 2024drv (Canes Venatici) SN 2024drv (Type: II) discovered 2024-03-02.513 UT by ATLAS Alias: ATLAS24dct Discovery Magnitude 16.56 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Mag 18.86  ( TNS 2024drv )

UGC 8630 with SN 2024drv - 2024-03-22 (T+19.6d) Image below (2024-03-22.078) was taken 19.6 days after discovery of 2024drv Position of reported SN (distinct) is indicated by white cross-hairs. Measured Magnitude +15.12 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-03-22 02:01 UT (#1200035-39) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024drv (in UGC 8630) on Supernova 2024 Page >>

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UGC 11858 - Spiral Galaxy with Type Ia Supernova 2023rjj (non-detection)

UGC 11858 with SN 2023rjj (Cygnus) SN 2023rjj (Type: Ia) discovered 2023-09-05.340 UT by ALeRCE Alias: ZTF23abaxkwq Discovery Magnitude 18.17 (g-ZTF Filter)  ( TNS 2023rjj )

UGC 11858 with SN 2023rjj - 2024-03-22 (T+198.8d) Image below (2024-03-22.156) was taken 198.8 days after discovery of 2023rjj Position of reported transient (not visible) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-03-22 03:53 UT (#1200095-99) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 11858 with SN 2023rjj - Earlier Image, 2023-09-08 (T+3.6d) Image below (2023-09-08.900) was taken 3.6 days after discovery of 2023rjj Position of reported supernova (faint but distinct) is indicated by white cross-hairs. Measured Magnitude ? (unable to differentiate SN from nucleus)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-08 21:45 UT (#1141045-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023rjj (in UGC 11858) on Supernova 2023 Page >>

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