David's Astronomy - Images 2025-03-06 (S1300)

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Images - Session 1300 (2025-03-06)

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(S1299)

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Images
(S1301)

Objects Session Notes

AT 2024fxd - Type Nova Transient

AT 2024aasb - Type YSO? Transient

AT 2024aelh - CV Type Transient

UGC 604 - Spiral Galaxy with Type II Supernova 2024advj

Variable Stars (photometric monitoring)

- GK Per, ER UMa

Nearby Stars (astrometric monitoring)

- None

- HH And attempt failed (due to cloud)

- Attempted night session (2.4h), affected by Rain Trim issue at start of session and ended early by cloud.

- 12" LX200 + ST-10XME for imaging

- TS 80mm APO + ZWO ASI178MC for guiding & imaging

- Ambient Temperature: -20.5°C (min)

- CCD Temperature: -15°C

- Notes from 2025-03-06 >>

-

Observing Result

AT 2024fxd - Type Nova Transient

AT 2024fxd (Virgo)
AT 2024fxd (Type: Nova) discovered 2024-03-28.947 UT by MASTER
Alias: MASTER OT J113826.69+032205.1
Discovery Magnitude 12.9 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 19.6
( TNS 2024fxd )

AT 2024fxd - 2025-03-06 (T+342.9d)
Image below (2025-03-06.850) was taken 342.9 days after discovery of 2024fxd
Position of earlier transient (fading) is shown by white cross-hairs
Measured Magnitude +15.99 (Clear Filter)
Poor quality image (poor guiding/poor transparency, single image)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2025-03-06 20:24 UT (#1300019)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024fxd on Transients 2024 Page >>

AT 2024aasb - Type YSO? Transient

AT 2024aasb (Camelopardalis)
AT 2024aasb (Type: YSO?) discovered 2024-11-03.961 UT by Gaia
Alias: Gaia24dfc
Alerting Magnitude 15.09 (G-Gaia Filter)
vs Historic Magnitude 16.24 +/- 0.41 SD
Historic Range 15.51 to 17.87 (2014-2024)
Brightening in candidate YSO
( TNS 2024aasb | Gaia24dfc )

AT 2024aasb - 2025-03-06 (T+122.9d)
Image below (2025-03-06.903) was taken 122.9 days after discovery of 2024aasb
Position of reported transient (barely visible) is shown by white cross-hairs
Estimated magnitude +17.0 to +18.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-06 21:44 UT (#1300058-59)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024aasb - Earlier Image, 2024-11-17 (T+14.0d)
Image below (2024-11-17.917) was taken 14.0 days after discovery of 2024aasb
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +15.51 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-11-17 22:01 UT (#1271073)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024aasb on Transients 2024 Page >>

AT 2024aelh - CV Type Transient

AT 2024aelh (Perseus)
AT 2024aelh (Type: CV) discovered 2024-12-18.802 UT by Gaia
Alias: Gaia24dsb
Alerting Magnitude 16.23 (G-Gaia Filter)
vs Historic Magnitude 17.70 +/- 0.43 SD
Brightening in erratic Gaia source
( TNS 2024aelh | Gaia24dsb )

AT 2024aelh - 2025-03-06 (T+78.1d)
Image below (2025-03-06.870) was taken 78.1 days after discovery of 2024aelh
Position of reported transient (barely visible) is shown by white cross-hairs
Estimated Magnitude +18.40 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-03-06 20:55 UT (#1300034-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024aelh - Earlier Image, 2024-12-24 (T+6.1d)
Image below (2024-12-24.924) was taken 6.1 days after discovery of 2024aelh
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +15.99 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-12-24 22:14 UT (#1287111-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024aelh on Transients 2024 Page >>

UGC 604 - Spiral Galaxy with Type II Supernova 2024advj

UGC 604 with SN 2024advj (Andromeda)
SN 2024advj (Type: II) discovered 2024-12-11.191 UT by ATLAS
Alias: ATLAS24riq, ZTF24abxpkhb, Gaia24dqw
Discovery Magnitude 17.87 (g-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude 20.20
Confirmed SN II (Gaia)
Gaia, 2024-12-13 13:08, mag 16.63
( TNS 2024advj | Gaia24dqw )

UGC 604 with SN 2024advj - 2025-03-06 (T+85.7d)
Image below (2025-03-06.885) was taken 85.7 days after discovery of 2024advj
Position of earlier SN (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.2 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2025-03-06 21:14 UT (#1300049)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 604 with SN 2024advj - 2024-12-18 (T+7.6d)
Image below (2024-12-18.769) was taken 7.6 days after discovery of 2024advjj
Position of earlier SN (faint, but distinct) is shown by white cross-hairs
Measured Magnitude +15.51 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-12-18 18:35 UT (#1284015-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024advj (in UGC 604) on Supernova 2024 Page >>