V1017 Sagittarii

V1017 Sagittarii is a cataclysmic variable star system in the constellation Sagittarius. It first erupted in 1919, reaching magnitude 7. Its other eruptions in 1901, 1973 and 1991 only reached magnitude 10, leading it to be reclassified from a recurrent nova to a dwarf nova.[4]

V1017 Sagittarii
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension  18h 32m 04.4738s[1]
Declination −29° 23′ 12.5935″[1]
Apparent magnitude (V) 4.5±2 Max.
13.5 Min.[2]
Characteristics
Spectral type G5IIIp / white dwarf
Variable type eclipsing recurrent nova (NR+E)
Astrometry
Radial velocity (Rv)15 km/s
Proper motion (μ) RA: 5.241±0.086[1] mas/yr
Dec.: −10.392±0.066[1] mas/yr
Parallax (π)0.7892 ± 0.0437[1] mas
Distance1269+84
−60[2] pc
Other designations
Nova Sagittarii 1919, AAVSO 1825-29, Gaia DR2 4048251562703375488, 2MASS J18320447-2923125[3]
Database references
SIMBADdata

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Schaefer, Bradley E. (2018). "The distances to Novae as seen by Gaia". Monthly Notices of the Royal Astronomical Society. 481 (3): 3033–3051. arXiv:1809.00180. Bibcode:2018MNRAS.481.3033S. doi:10.1093/mnras/sty2388.
  3. "V1017 Sagittarii". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-25.
  4. Schaefer, Bradley E. (2010). "Comprehensive Photometric Histories of All Known Galactic Recurrent Novae". The Astrophysical Journal Supplement. 187 (2): 275–373. arXiv:0912.4426. Bibcode:2010ApJS..187..275S. doi:10.1088/0067-0049/187/2/275.
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