Spectrum of Nova RS Oph 2021


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:



Data about Nova RS Oph 2021

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]


Image and spectra of Nova RS Oph 2021

Image of Nova RS Oph 2021
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:

Spectrum of Nova RS Oph 2021, August 13th

Spectrum of Nova RS Oph 2021, August 13th
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.


Line identification and discussion

Here is the labelled spectrum:

labelled spectrum of Nova RS Oph 2021, August 13th
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 | Email icon Gregor Krannich | Gregors astronomy page ]