David's Astronomy - Images 2026-03-08 (S1403)

David's Astronomy Pages
Images - Session 1403 (2026-03-08)

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Objects Session Notes

29P/Schwassmann-Wachmann - Comet

240P/NEAT - Comet

C/2026 B2 (Sun-Gao) - Comet

AT 2023vzm - Transient (non-detection)

AT 2026eva - Type CV? Transient

AT 2026evo - CV Type Transient

Berkeley 17 - Open Cluster

Berkeley 19 - Open Cluster

Berkeley 69 - Open Cluster

Berkeley 71 - Open Cluster

IC 700 - Spiral Galaxy with Type IIb Supernova 2025aico

NGC 744 - Open Cluster

UGCA 200 - Irregular Galaxy (PGC 29299)

UGC 525 - Spiral Galaxy with Type Ia Supernova 2025ahxd

UGC 622 - Spiral Galaxy with Transient AT 2026epv

- UGCA 277 attempt failed (due to cloud)

Variable Stars (photometric monitoring)

- T CrB, BL Lac, FU Ori

Nearby Stars (astrometric monitoring)

- None

- All-Night Session (9.9 hr)

- 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 2026-03-08 >>

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29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2026-03-08 (passing through Leo) Sun Distance 6.31 AU Earth Distance 5.33 AU (796.7 million km)		29P/Schwassmann-Wachmann - 2026-03-08 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -16.4 arcsec/hr, Dec 5.3 arcsec/hr) Measured M2 Magnitude +15.12 (Clear Filter)

Annotated CCD Image (50% size, square root scale) 7 x 90s exposure (average combine), 3x3 binning, Clear Filter 2026-03-08 23:00 UT (#1403080-86) 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) 7 x 90s exposure (average combine), 3x3 binning, Clear Filter 2026-03-08 23:00 UT (#1403080-86) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Comet_29P_Schwassmann-Wachmann on Comets 2026 Page >>

240P/NEAT - Comet

240P/NEAT - 2026-03-08 (passing through Taurus) Sun Distance 2.21 AU Earth Distance 2.15 AU (321.2 million km)		240P/NEAT - 2026-03-08 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 55.2 arcsec/hr, Dec 23.4 arcsec/hr)

Annotated CCD Image (50% size, square root scale) 2 x 60s exposure (average combine), 3x3 binning, Clear Filter 2026-03-08 20:54 UT (#1403033-34) 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) 9 x 60s exposure (average combine), 3x3 binning, Clear Filter 2026-03-08 20:58 UT (#1403033-41) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Comet_240P_NEAT on Comets 2026 Page >>

C/2026 B2 (Sun-Gao) - Comet

C/2026 B2 (Sun-Gao) - 2026-03-09 (passing through Pegasus) Sun Distance 1.54 AU Earth Distance 2.21 AU (330.8 million km)		C/2026 B2 (Sun-Gao) - 2026-03-09 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 119.3 arcsec/hr, Dec 55.2 arcsec/hr)

Annotated CCD Image (50% size, square root scale) 11 x 90s exposure (average combine), 3x3 binning, Clear Filter 2026-03-09 04:43 UT (#1403131-44) 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) 11 x 90s exposure (average combine), 3x3 binning, Clear Filter 2026-03-09 04:43 UT (#1403131-44) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of C2026_B2_Sun-Gao on Comets 2026 Page >>

AT 2023vzm - Transient (non-detection)

AT 2023vzm (Delphinus)
AT 2023vzm (Type: unk) discovered 2023-10-29.094 UT by GEOTS
Alias: GEOTS-Balaji-2023-021, TCP J20170886+1310433, ZTF23abnpiqz
Discovery Magnitude 15.8 (Clear- Filter)
vs Prior Non-Detection Limiting Magnitude 18 (Clear- Filter)
Hostless transient at galactic latitude -12.27 deg, galactic longitude 054.8 deg.
( TNS 2023vzm )

AT 2023vzm - 2026-03-09 (T+862.1d)
Image below (2026-03-09.212) was taken 862.1 days after discovery of 2023vzm
Position of earlier transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.9 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2026-03-09 05:05 UT (#1403149)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023vzm on Transients 2023 Page >>

AT 2026eva - Type CV? Transient

AT 2026eva (Orion)
AT 2026eva (Type: CV?) discovered 2026-03-03.154 UT by GEOTS
Alias: GEOTS-Balaji-2026-002
Discovery Magnitude 16.6 (Clear- Filter)
vs Prior Non-Detection Limiting Magnitude 18 (Clear- Filter)
Discovered in Ori using 14" f/2.0 Astrograph at Golden Ears Observatory (MPC code U55). We report a variable star candidate not currently archived in the VSX database. Analysis of ASAS-SN (All-Sky Automated Survey for SuperNovae) light curves reveals a brightness fluctuation exceeding 1.0 magnitude, suggesting a potential long-period variable or high-amplitude eclipsing system.
( TNS 2026eva )

AT 2026eva - 2026-03-08 (T+5.8d)
Image below (2026-03-08.940) was taken 5.8 days after discovery of 2026eva
Position of earlier transient (faint) is shown by white cross-hairs
Measured Magnitude +16.32 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-03-08 22:36 UT (#1403072-73)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2026eva on Transients 2026 Page >>

AT 2026evo - CV Type Transient

AT 2026evo (Triangulum)
AT 2026evo (Type: CV) discovered 2026-03-04.223 UT by ATLAS
Alias: ATLAS26con
Discovery Magnitude 16.528 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 18.62 (orange-ATLAS Filter)
( TNS 2026evo )

AT 2026evo - 2026-03-08 (T+4.6d)
Image below (2026-03-08.854) was taken 4.6 days after discovery of 2026evo
Position of earlier transient (distinct, fading) is shown by white cross-hairs
Measured Magnitude +16.91 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-03-08 20:39 UT (#1403026-30)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2026evo on Transients 2026 Page >>

Berkeley 17 - Open Cluster

Berkeley 17 (Auriga)
[ Open Star Clusters ]

Annotated CMOS Image (16% size, linear scale (auto-stretched))
30 x 10s exposure (average combine), 1x1 binning, gain 375, OSC
2026-03-08 21:48 UT (#)
TS 80mm APO + ZWO ASI178MC
Auto-guided using 12" LX200R + ST-10XME & PHD2

Berkeley 17 - Detail
5 mins total exposure (80mm TS80)

CMOS Image (50% size, linear scale (auto-stretched), cropped)
Image details as above

Berkeley 17 - Earlier Image (Sep 2020)
4.5 mins total exposure (12" LX200)

CCD Image (70% size, square root scale)
9 x 30s exposure (average combine), 3x3 binning, C Filter
2020-09-04 02:13 UT (#804284-92)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Berkeley 19 - Open Cluster

Berkeley 19 (Auriga)
[ Open Star Clusters ]

Annotated CMOS Image (16% size, linear scale (auto-stretched))
30 x 10s exposure (average combine), 1x1 binning, gain 375, OSC
2026-03-08 22:04 UT (#)
TS 80mm APO + ZWO ASI178MC
Auto-guided using 12" LX200R + ST-10XME & PHD2

Berkeley 19 - Detail
5 mins total exposure time (80mm TS80)

CMOS Image (50% size, linear scale (auto-stretched), cropped)
Image details as above

Berkeley 19 - Earlier Image (Sep 2020)
4 mins total exposure (12" LX200)

CCD Image (70% size, square root scale)
8 x 30s exposure (average combine), 3x3 binning, C Filter
2020-09-01 03:08 UT (#802193-201)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Berkeley 69 - Open Cluster

Berkeley 69 (Auriga)
[ Open Star Clusters ]

Annotated CMOS Image (16% size, linear scale (auto-stretched))
30 x 10s exposure (average combine), 1x1 binning, gain 375, OSC
2026-03-08 21:15 UT (#)
TS 80mm APO + ZWO ASI178MC
Auto-guided using 12" LX200R + ST-10XME & PHD2

Berkeley 69 (Auriga)
5 mins total exposure (80mm TS80)
80mm TS80 has light collecting area of 50.3 cm2 (vs 730 cm2 for LX200)
(Total exposure of 50 mins would be needed to capture the same number of photons that
12" LX200 captured in 3.5 mins)

Annotated CMOS Image (50% size, linear scale (auto-stretched), cropped)
Image details as above

Berkeley 69 - Earlier Image (Oct 2020)
3.5 mins total exposure (12" LX200)

12" LX200 has light collecting area of 113 sq in (730 cm2)

CCD Image (70% size, square root scale)
7 x 30s exposure (average combine), 3x3 binning, C Filter
2020-09-03 23:56 UT (#804175-83)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Berkeley 71 - Open Cluster

Berkeley 71 (Auriga)
[ Open Star Clusters ]

Annotated CMOS Image (16% size, linear scale (auto-stretched))
30 x 10s exposure (average combine), 1x1 binning, gain 375, OSC
2026-03-08 21:33 UT (#)
TS 80mm APO + ZWO ASI178MC
Auto-guided using 12" LX200R + ST-10XME & PHD2

Berkeley 71 (Auriga)
5 mins total exposure (80mm TS80)

Annotated CMOS Image (50% size, linear scale (auto-stretched), cropped)
30 x 10s exposure (average combine), 1x1 binning, gain 375, OSC
2026-03-08 21:33 UT (#)
TS 80mm APO + ZWO ASI178MC
Auto-guided using 12" LX200R + ST-10XME & PHD2

Berkeley 71 - Earlier Image
3 mins total exposure (12" LX200)

CCD Image (70% size, linear scale)
6 x 30s exposure (average combine), 3x3 binning, C Filter
2020-05-06 22:00 UT (#780008-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 700 - Spiral Galaxy with Type IIb Supernova 2025aico

IC 700 with SN 2025aico (Leo)
SN 2025aico (Type: IIb) discovered 2025-12-24.202 UT by GOTO
Alias: GOTO25mmu, ATLAS25qfv, ZTF25ackyfnb
Discovery Magnitude 16.86 (L-GOTO Filter)
vs Prior Non-Detection Limiting Magnitude 20.3 (L-GOTO Filter)
( TNS 2025aico )

IC 700 with SN 2025aico - 2026-03-09 (T+74.9d)
Image below (2026-03-09.138) was taken 74.9 days after discovery of 2025aico
Position of earlier supernova (faint) is shown by white cross-hairs
Measured Magnitude +16.01 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-03-09 03:24 UT (#1403111-13)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025aico (in IC 700) on Supernovae 2025 Page >>

NGC 744 - Open Cluster

NGC 744 (Perseus)
[ Open Star Clusters ]

Annotated CCD Image (50% size, linear scale)
7 x 30s exposure (average combine), 3x3 binning, Clear Filter
2026-03-08 22:16 UT (#1403055-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 744 - Detail

Annotated CCD Image (90% size, linear scale, cropped)
7 x 30s exposure (average combine), 3x3 binning, Clear Filter
2026-03-08 22:16 UT (#1403055-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 744 - Earlier Image (Dec 2003)

CCD Image, 10s exposure
2003-12-07 21:33 h UT (#55077)
8" LX200 Classic + ST-7E

UGCA 200 - Irregular Galaxy (PGC 29299)

UGCA 200 (Sextans)
Alias: PGC 29299
[ Irregular Galaxies ] [ UGCA Galaxies ]

Annotated CCD Image (50% size, square root scale)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-03-08 23:21 UT (#1403090-92)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 200 - Detail

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-03-08 23:21 UT (#1403090-92)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 525 - Spiral Galaxy with Type Ia Supernova 2025ahxd

UGC 525 with SN 2025ahxd (Pisces)
SN 2025ahxd (Type: Ia) discovered 2025-12-22.101 UT by ATLAS
Alias: ZTF25ackdapv
Discovery Magnitude 20.1472 (g-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude 20.9825 (g-ZTF Filter)
( TNS 2025ahxd )

UGC 525 with SN 2025ahxd - 2026-03-08 (T+76.7d)
Image below (2026-03-08.824) was taken 76.7 days after discovery of 2025ahxd
Position of earlier supernova (faint) is shown by white cross-hairs
Measured Magnitude +16.90 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-03-08 19:55 UT (#1403011-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 525 with SN 2025ahxd - Earlier Image, 2026-01-13 (T+22.8d)
Image below (2026-01-13.938) was taken 22.8 days after discovery of 2025ahxd
Position of earlier supernova (distinct) is shown by white cross-hairs
Measured Magnitude +15.26 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-01-13 22:40 UT (#1390134-38)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2025ahxd (in UGC 525) on Supernovae 2025 Page >>

UGC 622 - Spiral Galaxy with Transient AT 2026epv

UGC 622 with AT 2026epv (Andromeda)
AT 2026epv (Type: unk) discovered 2026-02-27.000 UT by Giancarlo Cortini
Discovery Magnitude 17.5 (Clear- Filter)
vs Prior Non-Detection Limiting Magnitude ( Filter)
Possible discovery by Giancarlo Cortini at Monte Maggiore Observatory Predappio Italy
Discovery date Feb 27 18:30 UT
( TNS 2026epv )

UGC 622 with AT 2026epv - 2026-03-08 (T+9.8d)
Image below (2026-03-08.839) was taken 9.8 days after discovery of 2026epv
Position of earlier transient (faint) is shown by white cross-hairs
Estimated Magnitude +16.7 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-03-08 20:17 UT (#1403019-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2026epv on Transients 2026 Page >>

UGC 525 - Spiral Galaxy with Type Ia Supernova 2025ahxd

Images of SN 2025ahxd (in UGC 525) on Supernovae 2025 Page >>