David's Astronomy Pages
Images - Session 1417 (2026-04-05)

Objects Session Notes
Bullet 24P/Schaumasse - Comet
Bullet 29P/Schwassmann-Wachmann - Comet
 
Bullet C/2025 R3 (PANSTARRS) - Comet
 
Bullet KIC 8462852 - Variable Star (Tabby's Star, Boyajian's Star, WTF Star)
 
Bullet AT 2026cqc - CV Type Transient
 
Bullet M31N 2025-10a? - Extragalactic Nova in M31
Bullet M53 - Globular Cluster
 
Bullet NGC 3660 - Spiral Galaxy with Type II Supernova 2026cff
Bullet NGC 3689 - Spiral Galaxy with Type Ib Supernova 2026gwx
Bullet NGC 4205 - Spiral Galaxy with Type Ia Supernova 2026fvx
Bullet NGC 4914 - Elliptical Galaxy with Type Ia Supernova 2026fjc
Bullet NGC 5466 - Globular Cluster (H VI-9)
Bullet NGC 7292 - Irregular Galaxy with Type II Supernova 2026fov
 
Bullet PCG 1151+2738 - Compact Galaxy Group
Bullet PCG 1212+2235 - Compact Galaxy Group
Bullet PCG 1352+1234 - Compact Galaxy Group
 
- AT2026hur attempt failed (due to cloud)
 
Bullet Variable Stars (photometric monitoring)
- T CrB, SS Cyg, RZ LMi, BL Lac, KIC 8462852 (Tabby's Star)
 
Bullet Nearby Stars (astrometric monitoring)
- None
 
- All-Night Session (7.2 hr)
- 12" LX200 + ST-10XME for imaging
- TS 80mm APO + ZWO ASI178MC for guiding & imaging
- Ambient Temperature: 2.5°C (min)
- CCD Temperature:  -20°/-25°C
- Notes from 2026-04-05 >>
-
-

Observing Result

Image

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24P/Schaumasse  - Comet

24P/Schaumasse - 2026-04-06
(passing through Serpens)

Sun Distance 1.63 AU
Earth Distance 0.70 AU (105.1 million km)
   24P/Schaumasse - 2026-04-06 Detail
Autoguided on offset star using PHD2 with Lock Shift
set at the comet's rate of motion
(Ra -43.8 arcsec/hr, Dec -11.9 arcsec/hr)
Image    Image
Annotated CCD Image (50% size, square root scale)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 00:52 UT (#1417071-73)
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)
15 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 01:01 UT (#1417071-88)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
      
Images of Comet_24P_Schaumasse on Comets 2026 Page  >>     

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29P/Schwassmann-Wachmann  - Comet

29P/Schwassmann-Wachmann - 2026-04-05
(passing through Leo)

Sun Distance 6.31 AU
Earth Distance 5.41 AU (809.9 million km)
   29P/Schwassmann-Wachmann - 2026-04-05 Detail
Autoguided on offset star using PHD2 with Lock Shift
set at the comet's rate of motion
(Ra -12.8 arcsec/hr, Dec 5.5 arcsec/hr)
Measured M2 Magnitude +16.18 (Clear Filter)
Image    Image
Annotated CCD Image (50% size, square root scale)
2 x 90s exposure (average combine), 3x3 binning, Clear Filter
2026-04-05 22:06 UT (#1417022-23)
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 Comet_29P_Schwassmann-Wachmann on Comets 2026 Page  >>     

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C/2025 R3 (PANSTARRS)  - Comet

C/2025 R3 (PANSTARRS) - 2026-04-06
(passing through Pegasus)

Sun Distance 0.60 AU
Earth Distance 1.07 AU (160.1 million km)
   C/2025 R3 (PANSTARRS) - 2026-04-06 Detail
Autoguided on offset star using PHD2 with Lock Shift
set at the comet's rate of motion
(Ra 90.2 arcsec/hr, Dec 0.3 arcsec/hr)
Image    Image
Annotated CCD Image (50% size, log scale)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 03:43 UT (#1417156-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
   Annotated CCD Image (100% size, log scale, cropped)
8 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 03:47 UT (#1417156-63)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
      
Images of C2025_R3_PANSTARRS on Comets 2026 Page  >>     

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KIC 8462852  - Variable Star (Tabby's Star, Boyajian's Star, WTF Star)

KIC 8462852 (Cygnus)
Alias: Tabby's Star, Boyajian's Star, WTF Star
Star shows large irregular dimmings. 1470 ly. Mag +11.7
Position of earlier transient (distinct) is shown by white cross-hairs
Measured Magnitude +11.92 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, V Filter
2026-04-06 03:08 UT (#1417145-47)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 

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AT 2026cqc  - CV Type Transient

AT 2026cqc (Cygnus)
AT 2026cqc (Type: CV) discovered 2026-02-09.526 UT by MASTER
Alias: MASTER OT J191527.78+542418.1
Discovery Magnitude 16.4 (Other- Filter)
vs Prior Non-Detection Limiting Magnitude 17.8 (Other- Filter)
variable star, no OT at 2023-07-03 06:33:19 with mlim=17.8
( TNS 2026cqc )
 
AT 2026cqc - 2026-04-06 (T+55.5d)
Image below (2026-04-06.071) was taken 55.5 days after discovery of 2026cqc
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 01:45 UT (#1417106-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of AT 2026cqc on Transients 2026 Page  >>

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M31N 2025-10a? - Extragalactic Nova in M31

M31 with M31N 2025-10a? (Andromeda)
Nova M31 2025-10a? (Type: unk) discovered 2025-10-17.480 UT by Koichi Itagaki
Alias: TCP J00384865+4046079
[ Messier Objects
 
M31 with M31N 2025-10a? - 2026-04-06 (T+170.6d)
Image below (2026-04-06.084) was taken 170.6 days after discovery of M31N 2025-10a?
Position of earlier transient (faint) is shown by white cross-hairs
Measured Magnitude +16.13 (Clear Filter)
Image
Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 02:09 UT (#1417124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of M31N 2025-10a? (in M31) on Transients 2025 Page  >>

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M53  - Globular Cluster

M53 (Coma Berenices)
[ Globular Star Clusters ]  [ Messier Objects
 
M53 - Globular Cluster
Image
Annotated CMOS Image (16% size, auto-stretched)
30 x 45s exposure (average combine), 1x1 binning, gain 200, OSC
2026-04-05 22:55 UT (#)
TS 80mm APO + ZWO ASI178MC
Auto-guided using 12" LX200R + ST-10XME & PHD2
 
M53 - Detail
Image
Annotated CMOS Image (40% size, auto-stretched, cropped)
Image details as above
 
M53 - Earlier Image (Mar 2014)
Image
CCD Image (square root scale, 100% scale, cropped)
6 x 20s exposure (average combine), 3x3 binning, C Filter
2014-03-12 23:48 h UT (#562195-202)
12" LX200R (at f/10.4) + ST-10XME
 

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NGC 3660  - Spiral Galaxy with Type II Supernova 2026cff

NGC 3660 with SN 2026cff (Crater)
SN 2026cff (Type: II) discovered 2026-02-06.337 UT by ATLAS
Alias: ZTF26aaffpvx, ATLAS26bkl, GOTO26anl
Discovery Magnitude 17.0032 (r-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude 18.9768 (r-ZTF Filter)
Early SN candidate (r-rise > 0.51+-0.01 mag/day) classified using ALeRCE's stamp classifier (Carrasco-Davis et al. 2021) and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF26aaffpvx
( TNS 2026cff )
 
NGC 3660 with SN 2026cff - 2026-04-05 (T+58.6d)
Image below (2026-04-05.926) was taken 58.6 days after discovery of 2026cff
Position of earlier supernova (faint) is shown by white cross-hairs
Estimated Magnitude +16.6 (Clear Filter)
Image
Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-05 22:22 UT (#1417027-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026cff (in NGC 3660) on Supernovae 2026 Page  >>

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NGC 3689  - Spiral Galaxy with Type Ib Supernova 2026gwx

NGC 3689 with SN 2026gwx (Leo)
SN 2026gwx (Type: Ib) discovered 2026-03-20.236 UT by ATLAS
Alias: ZTF26aaodgsa
Discovery Magnitude 20.8896 (r-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude 20.921 (g-ZTF Filter)
Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167).
( TNS 2026gwx )
 
NGC 3689 with SN 2026gwx - 2026-04-05 (T+16.7d)
Image below (2026-04-05.942) was taken 16.7 days after discovery of 2026gwx
Position of earlier supernova (distinct) is shown by white cross-hairs
Measured Magnitude +14.80 (Clear Filter)
Image
Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-05 22:45 UT (#1417035-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026gwx (in NGC 3689) on Supernovae 2026 Page  >>

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NGC 4205  - Spiral Galaxy with Type Ia Supernova 2026fvx

NGC 4205 with SN 2026fvx (Draco)
SN 2026fvx (Type: Ia) discovered 2026-03-17.986 UT by ATLAS
Alias: ZTF26aamqluf, ATLAS26dgt
Discovery Magnitude 19.46 (Clear- Filter)
vs Prior Non-Detection Limiting Magnitude 19.97 (Clear- Filter)
( TNS 2026fvx )
 
NGC 4205 with SN 2026fvx - 2026-04-05 (T+18.9d)
Image below (2026-04-05.872) was taken 18.9 days after discovery of 2026fvx
Position of earlier supernova (distinct) is shown by white cross-hairs
Measured Magnitude +12.36 (Clear Filter)
Image
Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-05 21:04 UT (#1417005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026fvx (in NGC 4205) on Supernovae 2026 Page  >>

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NGC 4914  - Elliptical Galaxy with Type Ia Supernova 2026fjc

NGC 4914 with SN 2026fjc (Canes Venatici)
SN 2026fjc (Type: Ia) discovered 2026-03-12.080 UT by ATLAS
Alias: ATLAS26cwi, ZTF26aakqkpn, GOTO26ceh, WFST260310bkxqt
Discovery Magnitude 18.475 (wide-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.35 (orange-ATLAS Filter)
( TNS 2026fjc )
 
NGC 4914 with SN 2026fjc - 2026-04-06 (T+24.9d)
Image below (2026-04-06.017) was taken 24.9 days after discovery of 2026fjc
Position of earlier supernova (distinct) is shown by white cross-hairs
Measured Magnitude +14.43 (Clear Filter)
Image
Annotated CCD Image (125% size, log scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 00:34 UT (#1417064-68)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026fjc (in NGC 4914) on Supernovae 2026 Page  >>

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NGC 5466  - Globular Cluster (H VI-9)

NGC 5466 (Bootes)
Deep Sky Challenge object, AstNow May 2024
[ Deep Sky Challanges (Ast.Now) ]  [ Globular Star Clusters ]  [ Herschel 400 Objects
 
NGC 5466 - Globular Cluster
Image
Annotated CMOS Image (16% size, auto-stretched)
30 x 45s exposure (average combine), 1x1 binning, gain 200, OSC
2026-04-06 00:20 UT (#)
TS 80mm APO + ZWO ASI178MC
Auto-guided using 12" LX200R + ST-10XME & PHD2
 
NGC 5466 - Detail
Image
Annotated CMOS Image (50% size, auto-stretched, cropped)
Image details as above
 
NGC 5466 - Earlier Image (May 2024)
Image
Annotated CCD Image (70% size, linear scale)
6 x 45s exposure (average combine), 3x3 binning, Clear Filter
2024-05-15 23:24 UT (#1217036-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 

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NGC 7292  - Irregular Galaxy with Type II Supernova 2026fov

NGC 7292 with SN 2026fov (Pegasus)
SN 2026fov (Type: II) discovered 2026-03-14.851 UT by Koichi Itagaki
Alias: ZTF26aaltzhc
Discovery Magnitude 13.5 (Clear- Filter)
vs Prior Non-Detection Limiting Magnitude ( Filter)
0.35-m F/11 + CCD (KAF-1001E) unfiltered
( TNS 2026fov )
[ Irregular Galaxies
 
NGC 7292 with SN 2026fov - 2026-04-06 (T+22.2d)
Image below (2026-04-06.101) was taken 22.2 days after discovery of 2026fov
Position of earlier supernova (distinct) is shown by white cross-hairs
Measured Magnitude +14.08 (Clear Filter)
Image
Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 02:34 UT (#1417131-35)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026fov (in NGC 7292) on Supernovae 2026 Page  >>

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PCG 1151+2738  - Compact Galaxy Group

PCG 1151+2738 (Leo)
Palomar Compact Galaxy Catalogue, radius 27 arcsec, mag 15.1
[ PCG Groups
 
PCG 1151+2738 - Compacy Galaxy Group
Image
Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-05 23:49 UT (#1417049-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
PCG 1151+2738 - Detail
Image
Annotated CCD Image (150% size, square root scale, cropped)
Image details as above
 
Image
Annotated CCD Image (150% size, square root scale, cropped)
Image details as above
 
Image
Annotated negative CCD Image (150% size, square root scale, cropped)
Image details as above
 

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PCG 1212+2235  - Compact Galaxy Group

PCG 1212+2235 (Coma Berenices)
Palomar Compact Galaxy Catalogue, radius 22 arcsec, mag 15.2
[ PCG Groups
 
PCG 1212+2235 - Compact Galaxy Group
Image
Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-05 23:32 UT (#1417044-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
PCG 1212+2235 - Detail
Image
Annotated CCD Image (150% size, square root scale, cropped)
Image details as above
 
Image
Annotated CCD Image (150% size, square root scale, cropped)
Image details as above
 
PCG 1212+2235 (Coma Berenices)
Image
Annotated negative CCD Image (150% size, square root scale, cropped)
Image details as above
 

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PCG 1352+1234  - Compact Galaxy Group

PCG 1352+1234 (Coma Berenices)
Palomar Compact Galaxy Catalogue, radius 19 arcsec, mag 16.1
[ PCG Groups
 
PCG 1352+1234 - Compact Galaxy Group
Image
Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 00:10 UT (#1417057-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
PCG 1352+1234 (Coma Berenices)
Image
Annotated CCD Image (175% size, square root scale, cropped)
Image details as above
 
PCG 1352+1234 (Coma Berenices)
Image
Annotated CCD Image (175% size, square root scale, cropped)
Image details as above
 
Image
Annotated negative CCD Image (175% size, square root scale, cropped)
Image details as above
 

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NGC 7292  - Irregular Galaxy with Type II Supernova 2026fov

NGC 7292 with SN 2026fov (Pegasus)
SN 2026fov (Type: II) discovered 2026-03-14.851 UT by Koichi Itagaki
Alias: ZTF26aaltzhc
Discovery Magnitude 13.5 (Clear- Filter)
vs Prior Non-Detection Limiting Magnitude ( Filter)
0.35-m F/11 + CCD (KAF-1001E) unfiltered
( TNS 2026fov )
[ Irregular Galaxies
 
NGC 7292 with SN 2026fov - 2026-04-06 (T+22.2d)
Image below (2026-04-06.101) was taken 22.2 days after discovery of 2026fov
Position of earlier supernova (distinct) is shown by white cross-hairs
Measured Magnitude +14.08 (Clear Filter)
Image
Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 02:34 UT (#1417131-35)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Images of SN 2026fov (in NGC 7292) on Supernovae 2026 Page  >>

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PCG 1151+2738  - Compact Galaxy Group

PCG 1151+2738 (Leo)
Palomar Compact Galaxy Catalogue, radius 27 arcsec, mag 15.1
[ PCG Groups
 
PCG 1151+2738 - Compacy Galaxy Group
Image
Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-05 23:49 UT (#1417049-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
PCG 1151+2738 - Detail
Image
Annotated CCD Image (150% size, square root scale, cropped)
Image details as above
 
Image
Annotated CCD Image (150% size, square root scale, cropped)
Image details as above
 
Image
Annotated negative CCD Image (150% size, square root scale, cropped)
Image details as above
 

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PCG 1212+2235  - Compact Galaxy Group

PCG 1212+2235 (Coma Berenices)
Palomar Compact Galaxy Catalogue, radius 22 arcsec, mag 15.2
[ PCG Groups
 
PCG 1212+2235 - Compact Galaxy Group
Image
Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-05 23:32 UT (#1417044-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
PCG 1212+2235 - Detail
Image
Annotated CCD Image (150% size, square root scale, cropped)
Image details as above
 
Image
Annotated CCD Image (150% size, square root scale, cropped)
Image details as above
 
PCG 1212+2235 (Coma Berenices)
Image
Annotated negative CCD Image (150% size, square root scale, cropped)
Image details as above
 

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PCG 1352+1234  - Compact Galaxy Group

PCG 1352+1234 (Coma Berenices)
Palomar Compact Galaxy Catalogue, radius 19 arcsec, mag 16.1
[ PCG Groups
 
PCG 1352+1234 - Compact Galaxy Group
Image
Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2026-04-06 00:10 UT (#1417057-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
PCG 1352+1234 (Coma Berenices)
Image
Annotated CCD Image (175% size, square root scale, cropped)
Image details as above
 
PCG 1352+1234 (Coma Berenices)
Image
Annotated CCD Image (175% size, square root scale, cropped)
Image details as above
 
Image
Annotated negative CCD Image (175% size, square root scale, cropped)
Image details as above
 

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