David's Astronomy - Images 2025-03-31 (S1307)

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Images - Session 1307 (2025-03-31)

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Objects Session Notes

29P/Schwassmann-Wachmann - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - Comet

AT 2024rwq - CV Type Transient (non-detection)

AT 2025esv - Type CV? Transient

AT 2025esx - Type CV? Transient

AT 2025esy - Type CV? Transient (non-detection)

ARP 47 - Spiral Galaxy with LSB Companion (MCG+3-38-14)

ESO 565-G19 - Galaxy with Type Ia Supernova 2025efc

IC 3242 - Elliptical Galaxy, 1.24 Gly

LEDA 2155454 - Galaxy with Type Ia Supernova 2025erh

M85 - Elliptical Galaxy

NGC 2986 - Elliptical Galaxy with Type Ia Supernova 2025gj

NGC 3277 - Spiral Galaxy with Type Ib-Ca-rich Supernova 2025coe

NGC 4216 - Spiral Galaxy with Type Ia Supernova 2024gy (non-detection)

NGC 4619 - Spiral Galaxy with Type II Supernova 2024drt (non-detection)

NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw

Variable Stars (photometric monitoring)

- T CrB, BL Lac

Nearby Stars (astrometric monitoring)

- None

- Late night session (7.0 hr)

- 12" LX200 + ST-10XME for imaging

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

- Ambient Temperature: 3.5°C (min)

- CCD Temperature: -15°/-20°C

- Notes from 2025-03-31 >>

-

Observing Result

29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2025-03-31 (passing through Leo) Sun Distance 6.27 AU (turning ?) Earth Distance 5.56 AU (831.3 million km)		29P/Schwassmann-Wachmann - 2025-03-31 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -12.21 arcsec/hr, Dec 3.22 arcsec/hr)

Annotated CCD Image (50% size, square root scale) 9 x 90s exposure (average combine), 3x3 binning, Clear Filter 2025-03-31 22:46 UT (#1307027-35) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (125% size, square root scale, cropped) Image details as left

Images of 29P/Schwassmann-Wachmann on Comets 2023 Page >>
Images of 29P/Schwassmann-Wachmann on Comets 2024 Page >>
Images of 29P/Schwassmann-Wachmann on Comets 2025 Page >>

C/2023 A3 (Tsuchinshan-ATLAS) - Comet

C/2023 A3 (Tsuchinshan-ATLAS) - 2025-04-01 (passing through Delphinus) Sun Distance 3.23 AU (receeding) Earth Distance 3.54 AU (530.2 million km)		C/2023 A3 (Tsuchinshan-ATLAS) - 2025-04-01 Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -3.31 arcsec/hr, Dec 26.68 arcsec/hr)

Annotated CCD Image (50% size, square root scale) 3 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-04-01 03:04 UT (#1307123-25) 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) 10 x 30s exposure (average combine), 3x3 binning, Clear Filter 2025-04-01 03:07 UT (#1307123-32) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2024 Page >>
Images of C/2023 A3 Tsuchinshan-ATLAS on Comets 2025 Page >>

AT 2024rwq - CV Type Transient (non-detection)

AT 2024rwq (Lyra)
AT 2024rwq (Type: CV) discovered 2024-08-07.328 UT by ATLAS
Alias: ATLAS24mrh
Discovery magnitude 13.50 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.56
( TNS 2024rwq )

AT 2024rwq - 2025-04-01 (T+236.8d)
Image below (2025-04-01.169) was taken 236.8 days after discovery of 2024rwq
Position of earlier transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 04:07 UT (#1307151-55)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024rwq - Earlier Image, 2024-08-15 (T+8.6d)
Image below (2024-08-15.959) was taken 8.6 days after discovery of 2024rwq
Position of reported transient (distinct, but fading) is shown by white cross-hairs
Measured Magnitude +14.30 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-08-15 23:04 UT (#1228045-49)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024rwq on Transients 2024 Page >>

AT 2025esv - Type CV? Transient

AT 2025esv (Cygnus)
AT 2025esv (Type: CV?) discovered 2025-03-17.910 UT by XOSS
Alias: KATS25F002, TCP J19584776+4119174
Discovery Magnitude 16.93 (Clear Filter)
( TNS 2025esv )

AT 2025esv - 2025-04-01 (T+14.2d)
Image below (2025-04-01.112) was taken 14.2 days after discovery of 2025esv
Position of reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 02:49 UT (#1307116-20)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2025esv - Detail (T+14.2d)
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude +17.59 (Clear Filter)

Annotated CCD Image (175% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 02:49 UT (#1307116-20)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025esv on Transients 2025 Page >>

AT 2025esx - Type CV? Transient

AT 2025esx (Serpens)
AT 2025esx (Type: CV?) discovered 2025-03-17.918 UT by XOSS
Alias: KATS25F004, TCP J18050011-1130188
Discovery Magnitude 15.68 (Clear Filter)
( TNS 2025esx )

AT 2025esx - 2025-04-01 (T+14.2d)
Image below (2025-04-01.160) was taken 14.2 days after discovery of 2025esx
Position of reported transient (barely visible) is shown by white cross-hairs

AT 2025esx - Detail (T+14.2d)
Position of reported transient (barely visible) is shown by white cross-hairs
Estimated Magnitude +18.8 (Clear Filter)

Annotated CCD Image (175% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 03:53 UT (#1307147-48)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025esx on Transients 2025 Page >>

AT 2025esy - Type CV? Transient (non-detection)

AT 2025esy (Serpens)
AT 2025esy (Type: CV?) discovered 2025-03-17.919 UT by XOSS
Alias: KATS25F005, TCP J17265310-1544375
Discovery Magnitude 15.77 (Clear Filter)
( TNS 2025esx )

AT 2025esy - 2025-04-01 (T+14.2d)
Image below (2025-04-01.140) was taken 14.2 days after discovery of 2025esy
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 03:28 UT (#1307137-40)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2025esy - Detail (T+14.2d)

Annotated CCD Image (175% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 03:28 UT (#1307137-40)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2025esy on Transients 2025 Page >>

ARP 47 - Spiral Galaxy with LSB Companion on arm (MCG+3-38-14)

ARP 47 (Bootes) Alias: MCG+3-38-14 / CGCG 105-026 / PGC 52803 Poor quality image (single frame) Target to be rescheduled [ ARP Galaxies ]		Challenge to see tiny companion at end of hooked arm to East of MCG+3-38-14

Annotated CCD Image (50% size, square root scale) 180s exposure (single frame), 3x3 binning, Clear Filter 2025-04-01 01:14 UT (#1307082) 12" LX200R (at f/9.7) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (150% size, square root scale, cropped) Image details as left

ESO 565-G19 - Galaxy with Type Ia Supernova 2025efc

ESO 565-G19 with SN 2025efc (Hydra)
SN 2025efc (Type: Ia) discovered 2025-03-12.153 UT by ATLAS
using ATLAS El Sauce Telescope
Alias: ATLAS25cqk, ZTF25aaiwalj
Discovery Magnitude 17.45 (orange-ATLAS Filter)
( TNS 2025efc )

ESO 565-G19 - Galaxy with SN 2025efc (T+19.8d)
ESO 565-G19 / PGC 27227 (catalog mag +13.7)
Other galaxy is same FOV is PGC 27222 (catalog mag +15.3)

Annotated CCD Image (50% size, square root scale)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-31 21:45 UT (#1307009-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

ESO 565-G19 with SN 2025efc - 2025-03-31 (T+19.8d)
Image below (2025-03-31.904) was taken 19.8 days after discovery of 2025efc
Position of reported supernova (faint) is shown by white cross-hairs
Estimated Magnitude +14.8 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-31 21:45 UT (#1307009-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025efc (in ESO 565-G19) on Supernova 2025 Page >>

IC 3242 - Elliptical Galaxy, 1.24 Gly

IC 3242 (Coma Berenices)
Distance 1.24 Gyr, z=0.0942
[ Distant Galaxies ]

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 00:12 UT (#1307061-65)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 3242 - Detail

Annotated CCD Image (150% size, square root scale, cropped)
Image details as above

IC 3242 - Earlier Image (Feb 2022)

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, C Filter
2022-02-27 21:03 UT (#978025-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

LEDA 2155454 - Galaxy with Type Ia Supernova 2025erh

LEDA 2155454 with SN 2025erh (Lynx)
SN 2025erh (Type: Ia) discovered 2025-03-17.258 UT by ATLAS
using Palomar 1.2m Oschin Telescope
Alias: ATLAS25csl, GOTO25bbr, ZTF25aajcusp
Discovery Magnitude 18.07 (r-ZTF Filter)
( TNS 2025erh )

LEDA 2155454 - Galaxy with SN 2025erh (T+14.7d)
LEDA 2155454 / PGC 2155454 (catalog mag +15.9)

Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-31 23:34 UT (#1307048-50)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

LEDA 2155454 with SN 2025erh - 2025-03-31 (T+14.7d)
Image below (2025-03-31.978) was taken 14.7 days after discovery of 2025erh
Position of reported supernova (faint but distinct) is shown by white cross-hairs
Estimated Magnitude +15.69 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-31 23:34 UT (#1307048-50)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025erh (in LEDA 2155454) on Supernova 2025 Page >>

M85 - Elliptical Galaxy

M85 (Coma Berenices)
[ Messier Objects ]

Annotated CCD Image (100% size, log scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 00:59 UT (#1307075-79)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M85 - Detail

Annotated CCD Image (70% size, log root scale, cropped)
Image details as above

NGC 2986 - Elliptical Galaxy with Type Ia Supernova 2025gj

NGC 2986 with SN 2025gj (Hydra)
SN 2025gj (Type: Ia) discovered 2025-01-08.256 UT by DLT40
Alias: DLT25a, ZTF25aabmhly, ATLAS25aim, GOTO25gp
Discovery Magnitude 17.91 (Clear Filter)
( TNS 2025gj )

NGC 2986 - Elliptical Galaxy with SN 2025gj (T+82.7d)
Other galaxy is same FOV is PGC 27873 (catalog mag +14.4)

Annotated CCD Image (50% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-31 22:02 UT (#1307014-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 2986 with SN 2025gj - 2025-03-31 (T+82.7d)
Image below (2025-03-31.912) was taken 82.7 days after discovery of 2025gj
Position of reported supernova (faint) is shown by white cross-hairs
Measured Magnitude +16.97 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-31 22:02 UT (#1307014-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025gj (in NGC 2986) on Supernova 2025 Page >>

NGC 3277 - Spiral Galaxy with Type Ib-Ca-rich Supernova 2025coe

NGC 3277 with SN 2025coe (Leo Minor)
SN 2025coe (Type: Ib-Ca-rich) discovered 2025-02-24.634 UT by Koichi Itagaki
using 0.5-m F/6.9 Telescope
Alias: ATLAS25caa, ZTF25aahsvoc
Discovery Magnitude 17.4 (Clear Filter)
SN (z=0.00472) is suspected to be located in NGC 3277 (z=0.004720,
value from NED), but has a large offset.
( TNS 2025coe )

NGC 3277 with SN 2025coe - 2025-03-31 (T+35.3d)
Image below (2025-03-31.960) was taken 35.3 days after discovery of 2025coe
Position of reported supernova (not visible) is shown by white cross-hairs
Offset from the centre of NGC 3277 is particularly large and
there is some doubt as whether the SN belongs to NGC 3277 or not
Poor quality image (poor sky transparency)

Annotated CCD Image (125% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2025-03-31 23:02 UT (#1307038)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3277 with SN 2025coe - Earlier Image, 2025-03-18 (T+22.2d)
Image below (2025-03-18.861) was taken 22.2 days after discovery of 2025coe
Position of reported supernova (faint) is shown by white cross-hairs
Measured Magnitude +17.06 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-18 20:48 UT (#1303005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025coe (in NGC 3277) on Supernova 2025 Page >>

NGC 4216 - Spiral Galaxy with Type Ia Supernova 2024gy (non-detection)

NGC 4216 with SN 2024gy (Virgo)
SN 2024gy (Type: Ia, z=0.001183) discovered 2024-01-04.678 UT by Koichi Itagaki
Alias: AT2023acjv, AT2024ix, ASASSN-24ac, PSN J12155131+1306561
Discovery Magnitude 16.3 ( Clear Filter)
( TNS 2024gy )

NGC 4216 with SN 2024gy - 2025-03-31 (T+452.3d)
Image below (2025-03-31.988) was taken 452.3 days after discovery of 2024gy
Position of earlier SN (faded & no longer visible) is indicated by white cross-hairs.
Non-Detection Limiting Magnitude +18.2 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-31 23:46 UT (#1307054-55)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4216 with SN 2024gy - Earlier Image, 2024-01-17 (T+12.4d)
Image below (2024-01-17.069) was taken 12.4 days after discovery of 2024gy
Position of reported SN (distinct, brightening) is indicated by white cross-hairs.
Measured Magnitude +12.95 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-17 01:47 UT (#1183028-32)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024gy (in NGC 4216) on Supernova 2024 Page >>

NGC 4619 - Spiral Galaxy with Type II Supernova 2024drt (non-detection)

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 - 2025-04-01 (T+394.5d)
Image below (2025-04-01.019) was taken 394.5 days after discovery of 2024drt
Position of reported SN (no longer visible) is indicated by white cross-hairs.
Non-Detection Limiting Magnitude +18.5 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 00:37 UT (#1307068-72)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4619 with SN 2024drt - Earlier Image 2024-03-28 (T+25.5d)
Image below (2024-03-28.016) was taken 25.5 days after discovery of 2024drt
Position of reported SN (fairly distinct but fading) is indicated by white cross-hairs.
Estimated Magnitude +15.8 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-28 00:32 UT (#1201036-40)
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 >>

NGC 5957 - Spiral Galaxy with Type Ia Supernova 2025fvw

NGC 5957 with SN 2025fvw (Serpens)
SN 2025fvw (Type: Ia) discovered 2025-03-26.799 UT by Koichi Itagaki
using XingLong Telescope
Alias: ZTF25aaktqzg, GOTO25bhh, PS25avu, ATLAS25dcd
Discovery Magnitude 17.4 (Clear Filter)
( TNS 2025fvw )

NGC 5957 with SN 2025fvw - 2025-03-31 (T+5.1d)
Image below (2025-03-31.926) was taken 5.1 days after discovery of 2025fvw
Position of reported supernova (distinct, brightening) is shown by white cross-hairs
Measured Magnitude +14.71 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-03-31 22:23 UT (#1307021-25)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5957 with SN 2025fvw - 2025-04-01 (T+5.3d)
Image below (2025-04-01.065) was taken 5.3 days after discovery of 2025fvw
Position of reported supernova (distinct, brightening) is shown by white cross-hairs
Measured Magnitude +14.68 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-04-01 01:42 UT (#1307089-93)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025fvw (in NGC 5957) on Supernova 2025 Page >>

This Web Page:	Images - Session 1307 (2025-03-31)
Last Updated :	2025-06-24
Site Owner :	David Richards
Home Page :	David's Astronomy Web Site

David's Astronomy Pages Images - Session 1307 (2025-03-31)