Nova RS Oph 2021 (=V2575 Oph =HD 162214 =TYC 5094-550-1) is a bright recurring nova in constellation Ophiuchus. The discovery magnitude was 5.0 mag [1],[2]. The nova peaked around 8-9th June with a brightness of V=4.8 mag [3]. With this brightness it would be easily reachable with the Alpy600 spectrograph, it had been recorded short after it's maximum brightness. Up to now I took an image and a spectrum:
Position: | RA 17h 50m 13.17s, DEC -06° 42' 28.6" |
Progenitor: | V2575 Oph |
Discovery: | 2021 August 08.92 UT by A. Amorim, Florianopolis (Brazil), E. Muyllaert, Oostende (Belgium) and K. Geary, Shercock, Co. Cavan (Ireland) |
Brightness: | V=5.0 mag (at discovery date), V=4.5 mag (maximum at 2021-08-09.66), V=11.1 mag (2021-08-06.910 UT), see [2] |
2021-08-10 22:33 - 22:48 UT, Roof Observatory Kaufering,
Omegon Photoscope 72/432 mm on Taurus GM-60 mount, CCD: ASI 178MC, exposures: 172x5 sec; click to uncrop image;
For other images see
Here are my spectra of this nova:
2021-08-13 22:39 - 22:57 UT, Roof Observatory Kaufering,
Meade 14" ACF telescope on Taurus GM-60 mount, Astro Physics reducer CCDT67,
Alpy600 with guiding unit, CCD camera: Atik 428EX, guiding camera: ASI 120 MM; recording software: AstroArt, guiding software: PHD2;
Wavelength calibration: Hg lines from energy saving lamp and Ne lines from flicker flame light bulbs,
instrumental response calibration: with reference star HIP 86284 (=HD 159975), B8 II((Mn)), data reduction: with
Integrated Spectrographic Innovative Software from Christian Buil;
The spectral type of HIP 92934 may be unprecise in Simbad (character C). I achieved the best fit with a type of B8 V database spectrum.
Here is the labelled spectrum:
There are strong emission lines of Hydrogen, Helium and Iron. This is also shown in the atlas of spectroscopic evolution [4].
References:
[1] Nova RS Oph 2021 in vsnet-alert 26131
[2] Nova RS Oph 2021 in AAVSO alert notice 752
[3] Nova RS Oph 2021 in RS Oph outburst in Sky&Telescope
[4] U. Munari et al., The 2021 outburst of RS Oph. A pictorial atlas of the spectroscopic evolution: the first 18 days (PDF, engl.)
My other spectroscopic observations: Spektroskopie (German)
[ updated: 2023-02-16 | Gregor Krannich
| Gregors astronomy page ]