David's Astronomy Pages (Deep Sky)
 Novae 2025

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This page documents observations and images of galactic novae with discovery dates in 2025
Novae  Name, discovery date, alias
   
Bullet T CrB - Variable Star (potential nova in 2025)
Bullet Nova Ser 2025 (2025-07-17) - V691 Ser
   

T CrB - Variable Star (the 'Blaze Star')

T CrB (Corona Borealis)
Alias: GCVS T CrB, HIP 78322, SAO 84129, HD 143454
Max Magnitude  2.0
Min Magnitude 10.8
Spectral: M3III+pec(NOVA)
T CrB is a a binary star and a recurrent nova about 3000 ly distance
( T Coronae Borealis  Wikipedia )
( VSX T CrB )
 
Starfield with T CrB
Poor quality image (due to wind shake)
Image
Annotated CCD Image (70% size, linear scale)
3 x 20s exposure (average combine), 3x3 binning, Clear Filter
2024-09-12 22:49 UT (#1242047-50)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
T CrB - Magnitude - V Band
Image
 
T CrB - Magnitude (V Band) - Detail
Image
 
T CrB - Magnitude (B-V Band) - Detail
Image
 
T CrB - Reference Frame - 2024-09-06

VSX (Sequence Stars for T CrB)
Star  Id  VSX Id V Mag B-V B Mag
C Star (HD 143256) 98  000-BBW-796 9.809  1.034 10.843
K Star (GSC 2037:1228) 112  000-BBW-805 11.166 0.613 11.779

Image
Annotated CCD Image (70% size, linear scale)
2 x 20s exposure (average combine), 3x3 binning, Clear Filter
2024-09-06 20:54 UT (#1239020-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  


T CrB - (C Band) - 2024-09-06 (S1239)   T CrB - Photometry - 2024-09-06
Image  
Altitude 38.6, Airmass 1.602
Star  Id  V Mag
(ref)		 CV Mag 
(instr) 		 CV Mag
(calc)		   B Mag
(ref)		 B-V 
(ref)		 B Mag
(instr)		 B Mag
(calc)		 B-V
(calc)
C Star  98  9.809  -14.202      10.843 1.034  -    
K Star  112  11.166 -12.683  11.33   11.779 0.613  - - -
Var. Star  T CrB     -14.765  9.25   -    - - -
VSX (Sequence Stars for T CrB):
  Calibration Star (C) :  98 (000-BBW-796)
Check Star (K) :         112 (000-BBW-805)
Annotated CCD Image (50% size, linear scale)
2 x 20s exposure (average combine), 3x3 binning, Clear Filter
2024-09-06 20:54 UT (#1239020-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		    
      
T CrB (V Band) - 2024-09-10 (S1240)
Poor quality image (due to wind shake)		   T CrB - Photometry - 2024-09-10
Image  
Altitude 28.1, Airmass 2.126
Star  Id  V Mag
(ref)		 V Mag 
(instr)		 V Mag
(calc)		   B Mag
(ref)		 B-V 
(ref)		 B Mag
(instr)		 B Mag
(calc)		 B-V
(calc)
C Star  98  9.809  -13.112      10.843 1.034   -11.567    
K Star  112  11.166 -11.747 11.17   11.779 0.613  -10.541 11.87 0.70 
Var. Star  T CrB    -13.032 9.89    -    -11.308 11.10 1.18 
Annotated CCD Image (50% size, linear scale)
2 x 15s exposure (average combine), 3x3 binning, V Filter
2024-09-10 21:58 UT (#1240046-48)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
2 x 20s exposure (average combine), 3x3 binning, B Filter
2024-09-10 21:55 UT (#1240043-45)
      
      
T CrB (V Band) - 2024-09-12 (S1242)
   T CrB - Photometry - 2024-09-12
Image  
 Altitude 27.4, Airmass 2.175

Star  Id  V Mag
(ref)		 V Mag 
(instr) 		 V Mag
(calc)		   B Mag
(ref)		 B-V 
(ref)		 B Mag 
(instr) 		 B Mag
(calc)		 B-V
(calc)
C Star  98  9.809 -12.814     10.843 1.034  -11.593    
K Star  112  11.166 -11.539 11.08   11.779 0.613  -10.754 11.69 0.60 
Var. Star  T CrB    -12.697   9.93    -    -11.351 11.09 1.16 
Annotated CCD Image (50% size, linear scale)
3 x 15s exposure (average combine), 3x3 binning, V Filter
2024-09-12 21:56 UT (#1242017-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 20s exposure (average combine), 3x3 binning, B Filter
2024-09-12 21:55 UT (#1242016-20)
      
T CrB (V Band) - 2024-09-14 (S1243)   T CrB - Photometry - 2024-09-14
Image  
 Altitude 27.1, Airmass 2.190

Star  Id  V Mag
(ref)		 V Mag 
(instr)		 V Mag
(calc)		   B Mag
(ref)		 B-V 
(ref)		 B Mag 
(instr)		 B Mag
(calc)		 B-V
(calc)		  
C Star  98  9.809 -12.115     10.843 1.034  -10.936      
K Star  112  11.166 -10.770 11.15   11.779 0.613  -9.928 11.85 0.70   
Var. Star  T CrB    -11.955   9.97    -    -10.610 11.17 1.24   
Annotated CCD Image (50% size, linear scale)
3 x 15s exposure (average combine), 3x3 binning, V Filter
2024-09-14 21:49 UT (#1243041-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 20s exposure (average combine), 3x3 binning, B Filter
2024-09-14 21:48 UT (#1243040-44)
      
T CrB (V Band) - 2024-09-15 (S1244)
   T CrB - Photometry - 2024-09-15
Image  
Altitude 35.1, Airmass 1.737

Star  Id  V Mag
(ref)		 V Mag
(instr)		 V Mag
(calc)		   B Mag
(ref)		 B-V 
(ref)		 B Mag
(instr)		 B Mag
(calc)		 B-V
(calc)
C Star  98  9.809 -13.101     10.843 1.034  -11.910    
K Star  112  11.166 -11.785 11.13   11.779 0.613  -10.971 11.78 0.66 
Var. Star  T CrB    -12.964   9.95    -    -11.609 11.14 1.20 

Annotated CCD Image (50% size, linear scale)
3 x 15s exposure (average combine), 3x3 binning, V Filter
2024-09-15 20:46 UT (#1244018-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 20s exposure (average combine), 3x3 binning, B Filter
2024-09-15 20:45 UT (#1244017-21)
      
T CrB (V Band) - 2024-09-17 (S1246)   T CrB - Photometry - 2024-09-17
Image  
 Altitude 36.4,  Airmass 1.686

Star  Id  V Mag
(ref)		 V Mag
(instr) 		 V Mag
(calc)		   B Mag
(ref)		 B-V 
(ref)		 B Mag
(instr) 		 B Mag
(calc)		 B-V
(calc)
C Star  98  9.809 -12.949     10.843 1.034  -11.842    
K Star  112  11.166 -11.639 11.12   11.779 0.613  -10.979 11.71 0.59 
Var. Star  T CrB    -12.775   9.98    -    -11.579 11.11 1.12 
Annotated CCD Image (50% size, linear scale)
3 x 15s exposure (average combine), 3x3 binning, V Filter
2024-09-17 20:29 UT (#1246018-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 20s exposure (average combine), 3x3 binning, B Filter
2024-09-15 20:45 UT (#1244017-21)
      
T CrB (V Band) - 2024-09-18 (S1247)   T CrB - Photometry - 2024-09-18
Image  
Altitude 38.7, Airmass 1.599
Star  Id  V Mag
(ref)		 V Mag (inst) V Mag
(calc)		   B Mag
(ref)		 B-V 
(ref)		 B Mag
(inst.)   		B Mag
(calc)		 B-V
(calc)
C Star  98  9.809 -12.596     10.843 1.034  -11.570    
K Star  112  11.166 -11.308 11.10   11.779 0.613  -10.746 11.67 0.57 
Var. Star  T CrB    -12.404  10.00    -    -11.433 10.98 0.98 

Annotated CCD Image (50% size, linear scale)
3 x 15s exposure (average combine), 3x3 binning, V Filter
2024-09-18 20:08 UT (#1247011-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 20s exposure (average combine), 3x3 binning, B Filter
2024-09-18 20:07 UT (#1247010-14)
      
T CrB (V Band) - 2024-09-30 (S1248)   T CrB - Photometry - 2024-09-30
Image  
2024-09-30 21:58 UT

Altitude: 17.6°, Airmass: 3.292
Star  Id  V Mag
(ref)		 V Mag (inst) V Mag
(calc)		   B Mag
(ref)		 B-V 
(ref)		 B Mag
(inst.)   		B Mag
(calc)		 B-V
(calc)
C Star  98  9.809 -12.050     10.843 1.034  --10.791    
K Star  112  11.166 -10.819 11.04   11.779 0.613  -9.737 11.90 0.86 
Var. Star  T CrB    -11.845  10.01    -    -10.518 11.12 1.10 

Annotated CCD Image (50% size, linear scale)
3 x 15s exposure (average combine), 3x3 binning, V Filter
2024-09-30 21:58 UT (#1248084-88)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 20s exposure (average combine), 3x3 binning, B Filter
2024-09-30 21:57 UT (#1248083-87)
      
T CrB (V Band) - 2024-10-01 (S1249)   T CrB - Photometry - 2024-10-01
Image  


2024-10-01 21:45 UT

Altitude: 18.8°, Airmass: 3.094

T CrB  : 10.00 (V Mag), 11.15 (B Mag),  1.15 (B-V)
Annotated CCD Image (50% size, linear scale)
3 x 20s exposure (average combine), 3x3 binning, V Filter
2024-10-01 21:45 UT (#1249106-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 30s exposure (average combine), 3x3 binning, B Filter
2024-10-01 21:44 UT (#1249105-09)
      
T CrB (V Band) - 2024-10-02 (S1250)   T CrB - Photometry - 2024-10-02
Image  


2024-10-02 20:27 UT

Altitude: 28.6°, Airmass: 2.088

T CrB  : 10.12 (V Mag), 11.25 (B Mag),  1.13 (B-V)
Annotated CCD Image (50% size, linear scale)
3 x 20s exposure (average combine), 3x3 binning, V Filter
2024-10-02 20:27 UT (#1250006-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 30s exposure (average combine), 3x3 binning, B Filter
2024-10-02 20:26 UT (#1250005-09)
      
T CrB (V Band) - 2024-10-14 (S1255)   T CrB - Photometry - 2024-10-14
Image  


2024-10-14 19:44 UT

Altitude: 28.0°, Airmass: 2.129

T CrB  : 10.25 (V Mag), 11.54 (B Mag),  1.29 (B-V)

Fading
Annotated CCD Image (50% size, linear scale)
3 x 20s exposure (average combine), 3x3 binning, V Filter
2024-10-14 19:44 UT (#1255015-19)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 30s exposure (average combine), 3x3 binning, B Filter
2024-10-14 19:43 UT (#1255014-18)
      
T CrB (V Band) - 2024-10-19 (S1257)   T CrB - Photometry - 2024-10-19
Image  


2024-10-19 18:55 UT

Altitude: 32.0°, Airmass: 1.885

T CrB  : 10.24 (V Mag), 11.55 (B Mag),  1.31 (B-V)
Annotated CCD Image (50% size, linear scale)
3 x 20s exposure (average combine), 3x3 binning, V Filter
2024-10-19 18:55 UT (#1257053-57)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		   CCD Image (not shown)
3 x 30s exposure (average combine), 3x3 binning, B Filter
2024-10-19 18:54 UT (#1257052-56)
      
     

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Nova Ser 2025 (discovered 2025-07-17) - V691 Ser

Nova Ser 2025  (Serpens)
Nova Ser 2025 discovered 2025-07-17.908 UT by New Milky Way Survey
(TCP J18385851-0351482 - discovered 2025-07-17.909 UT by ZTF
Alias: ZTF25abbsdyb, N Ser 2025, V691 Ser
Discovery Magnitude 11.9
 
Nova Ser 2025 (T+23.1d)
Image
Annotated CCD Image (50% size, linear scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-08-10 00:04 UT (#1346013-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-08-09 (T+23.1d)
Image below (2025-08-09.997) was taken 23.1 days after discovery
Position of nova bright is shown by white cross-hairs
Measured Magnitude +12.93 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2025-08-10 00:04 UT (#1346013-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-08-16 pm (T+30.1d)
Image below (2025-08-16.963) was taken 30.1 days after discovery of nova
Position of nova (distinct) is shown by white cross-hairs
Measured Magnitude +13.40 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-08-16 23:08 UT (#1350029-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-08-17 am (T+30.1d)
Image below (2025-08-17.008) was taken 30.1 days after discovery of Nova
Position of nova (distinct) is shown by white cross-hairs
Measured Magnitude +13.40 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-08-17 00:14 UT (#1350059-63)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-08-26 (T+40.0d)
Image below (2025-08-26.949) was taken 40.0 days after discovery of nova
Position of nova (distinct) is shown by white cross-hairs
Measured Magnitude +13.68 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-08-26 22:50 UT (#1352036-40)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-08-31 (T+45.0d)
Image below (2025-08-31.921) was taken 45.0 days after discovery of nova
Position of nova (distinct but fading) is shown by white cross-hairs
Measured Magnitude +14.00 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-08-31 22:09 UT (#1354012-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-09-05 (T+50.0d)
Image below (2025-09-05.949) was taken 50.0 days after discovery of Nova Ser 2025
Position of nova (distinct but fading) is shown by white cross-hairs
Measured Magnitude +14.31 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-09-05 22:49 UT (#1358065-69)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-09-08 (T+53.0d)
Image below (2025-09-08.890) was taken 53.0 days after discovery of Nova Ser 2025
Position of nova (distinct but fading) is shown by white cross-hairs
Measured Magnitude +14.43 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-09-08 21:25 UT (#1359029-33)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-09-11 (T+56.0d)
Image below (2025-09-11.876) was taken 56.0 days after discovery of Nova Ser 2025
Position of nova (distinct but fading) is shown by white cross-hairs
Measured Magnitude +14.50 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-09-11 21:04 UT (#1361028-32)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-09-12 (T+56.9d)
Image below (2025-09-12.844) was taken 56.9 days after discovery of Nova Ser 2025
Position of nova (distinct but fading) is shown by white cross-hairs
Measured Magnitude +14.67 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-09-12 20:18 UT (#1362005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-09-16 (T+61.0d)
Image below (2025-09-16.903) was taken 61.0 days after discovery of Nova Ser 2025
Position of nova (fading) is shown by white cross-hairs
Measured Magnitude +14.86 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-09-16 21:44 UT (#1363051-55)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-09-17 (T+62.0d)
Image below (2025-09-17.947) was taken 62.0 days after discovery of Nova Ser 2025
Position of nova (fading) is shown by white cross-hairs
Measured Magnitude +14.80 (Clear Filter)
Poor quality image (single frame, not centred, poor sky transpareny due to cloud)
Image
Annotated CCD Image (100% size, linear scale, cropped)
60s exposure (single frame), 3x3 binning, Clear Filter
2025-09-17 22:44 UT (#1364027)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-09-25 (T+69.9d)
Image below (2025-09-25.838) was taken 69.9 days after discovery of Nova Ser 2025
Position of nova (fading) is shown by white cross-hairs
Measured Magnitude +15.27 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-09-25 20:09 UT (#1366013-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-10-27 (T+101.9d)
Image below (2025-10-27.800) was taken 101.9 days after discovery of Nova Ser 2025
Position of nova (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +15.6 to +16.1 (Clear Filter)
vs +15.46 Measured Magnitude in last session (S1368, T+73.0d)
Poor quality image (cloud / poor sky transparency)
Image
Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-10-27 19:14 UT (#1370024-26)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-11-25 (T+130.8d)
Image below (2025-11-25.738) was taken 130.8 days after discovery of Nova Ser 2025
Position of nova (very faint) is shown by white cross-hairs
Measured Magnitude +16.35 (Clear Filter)
(vs Limiting Magnitude + 16.6)
Poor quality image (thin cloud / single frame)
Image
Annotated CCD Image (100% size, linear scale, cropped)
60s exposure (single frame), 3x3 binning, Clear Filter
2025-11-25 17:42 UT (#1378026)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 - 2025-11-30 (T+135.8d)
Image below (2025-11-30.728) was taken 135.8 days after discovery of Nova Ser 2025
Position of nova (very faint) is shown by white cross-hairs
Measured Magnitude +16.49 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2025-11-30 17:32 UT (#1381008-12)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
  
Nova Ser 2025 (Nova) - 2026-02-14 (T+211.3d)
Image below (2026-02-14.258) was taken 211.3 days after discovery of N Ser 2025
Position of earlier transient (faint) is shown by white cross-hairs
Measured Magnitude +16.85 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-02-14 06:14 UT (#1393306-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
Nova Ser 2025 (Nova) - 2026-02-28 (T+ 225.3d)
 Image below (2026-02-28.2069) was taken 225.3 days after discovery of Nova
Position of earlier transient (faint) is shown by white cross-hairs
Measured Magnitude +16.85 (Clear Filter)
Image
Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2026-02-28 05:01 UT (#1396262-66)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
 
 

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This Web Page: Novae 2025
Last Updated : 2026-03-02
Site Owner : David Richards
Home Page : David's Astronomy Web Site