David's Astronomy Pages Images - Session 1239 (2024-09-06)

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Images (S1240)

Objects	Session Notes
13P/Olbers - Comet     T CrB - Variable Star     Variable Stars (photometric monitoring) - T CrB     Nearby Stars (astrometric monitoring) - Groombridge 34	- Very short evening session (0.7 hrs) which early because of the rapid development of cloud/haar which lasted for the remainder of the night.     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 14°C (min) - CCD Temperature:   -10°C - Notes from 2024-09-06 >>

Observing Result

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13P/Olbers - Comet

13P/Olbers - 2024-09-06 (passing through Bootes) Sun Distance 1.56 AU (receeding) Earth Distance 2.21 AU (330.4 million km)		13P/Olbers - 2024-09-06 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 111.17 arcsec/hr, Dec -75.64 arcsec/hr)
Annotated CCD Image (50% size, log scale) 60s exposure (single frame), 3x3 binning, Clear Filter 2024-09-06 20:39 UT (#1239008) 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) 10 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-09-06 20:46 UT (#1239008-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
13P/Olbers - 2024-09-06		13P/Olbers - 2024-09-06 Detail
Annotated false-colour CCD Image (50% size, log scale) 10 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-09-06 20:46 UT (#1239008-17) 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) Image details as left
Images of 13P/Olbers on Comets 2024 Page >>

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T CrB - Variable 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) ( VSX T CrB )

T CrB - Reference Frame - 2024-09-06 Variable (V) star - T CrB (Alias HIP 78322) Mags in TheSky6 Reference (C) star - HD 143256 (Mag 9.77,  V 9.89, B-V 1.26)  Check (K) Star - GSC 2037:1228 (Mag 11.08,  V 11.15,  B-V 0.66) Full Frame Photometry, using UCA/USNO Mags  in CCDSoft C star : (HD 143256)  Mag 9.50, K Star: (GSC 2037:1228), Mag  10.90, Meas. Mag +11.21 (C Filter) T CrB, Mag var,  Meas. Mag. +9.13 (C Filter) 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

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

More Images of T CrB >>

T CrB - (C Band) - 2024-09-06		T CrB - Photometry - 2024-09-06
		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
More Images & Data for T CrB >>

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