David's Astronomy Pages Images - Session 1166 (2023-11-12)

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Objects	Session Notes
C/2023 H2 (Lemmon) - Comet     Nova Cas 2021 - Nova (V1405 Cas) AT 2023wvl - CV Type Transient         Variable Stars (photometric monitoring) - None      Nearby Stars (astrometric monitoring) - EV Lac	- Evening session (1.4 hrs)., finished early due to developing cloud and the approach of Storm Debi     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 7.5°C (min) - CCD Temperature:   -15° C - Notes from 2023-11-12 >>     -

C/2023 H2 (Lemmon) - Comet

C/2023 H2 (Lemmon) - 2023-11-12 (passing through Aquila) Sun Distance 0.93 AU (receeding) Earth Distance 0.20 AU (30.6 million km)		C/2023 H2 (Lemmon) - 2023-11-12 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 912.98 arcsec/hr, Dec -1119.78 arcsec/hr) Fast moving : 24.1 arc min/hr
Annotated CCD Image (50% size, square root scale) 45s exposure (single frame), 3x3 binning, Clear Filter 2023-11-12 20:41 UT (#1166013) 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) Image details as left
Images of C/2023 H2 (Lemmon) on Comets 2023 Page >>

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Nova Cas 2021 - Nova (V1405 Cas)

Nova Cas 2021 (Cassiopeia) Nova in Cassiopeia discovered 2021-03-18.4236,  by Yuji Nakamura (Japan) Magnitude at discovery +9.6 (unfiltered CCD) AT2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia Alias: Gaia21bpe, AT2021hkn, V1405 Cas

Nova Cas 2021 - 2023-11-12 (T+969.5d) Image below (2023-11-12.885) was taken 969.5 days after discovery of nova Nova is shown by white cross hairs.  Measured magnitude +12.14

Annotated CCD Image (100% size, linear scale, cropped) 4 x 30s exposure (average combine), 3x3 binning, Clear Filter 2023-11-12 21:16 UT (#1166040-44) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2023-11-12 (T+969.5d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 90s exposure (average combine), 2x2 binning, S Filter 2023-11-12 21:22 UT (#1166045-49) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Cas 2021 on Novae Page >>

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AT 2023wvl - CV Type Transient

AT 2023wvl (Cygnus) AT 2023wvl (Type: CV) discovered 2023-11-06.700 UT by XOSS Alias: KATS23V002, TCP J19582065+5506531 Discovery magnitude 12.9 (Clear Filter) The spectral characteristics and an outburst amplitude of about 8 mag  (above a quiescent level of Vmag=21.3) suggest AT 2023wvl is a dwarf nova .  ( TNS 2023wvl )

AT 2023wvl - 2023-11-12 (T+6.2d) Image below (2023-11-12.871) was taken 6.2 days after discovery of 2023wvl Position of reported transient (relatively distinct, fading) is shown by white cross-hairs Measured magntitude +13.41 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, Clear Filter 2023-11-12 20:56 UT (#1166024-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023wvl on Transients 2023 Page >>

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