RZ Gruis

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RZ Gruis

A visual band light curve for RZ Gruis. The main plot shows the long term variation, and the inset plot shows the short term variability. Adapted from Sickland et al. (1984)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Grus
Right ascension 22h 47m 12.007s[2]
Declination −42° 44′ 38.72″[2]
Apparent magnitude (V) 11.6 - 13.6[3]
Characteristics
Variable type UX Ursae Majoris[1]
Distance
1,770 ± 60 ly
(540 ± 20 pc)
Details
AAVSO 2241-43, Gaia DR2 6544371342567818496[4]
Database references
SIMBADdata

RZ Gruis is a

accretion disc that remains bright and outshines the two component stars. The system is around 1,434 light-years away from Earth;[5] or as much as 1,770 light years based on a Gaia parallax.[6]

Originally named and discovered to be variable in 1949, RZ Gruis was discovered to be a cataclysmic variable after its spectrum was investigated in 1980. Considered initially to be a hot, blue

spectral type F5V.[1] These stars have spectra very similar to novae that have returned to quiescence after outbursts, yet they have not been observed to have erupted themselves. The American Association of Variable Star Observers recommends watching this class of star for future events such as possible nova eruptions.[8]

References

  1. ^
    doi:10.1093/mnras/206.4.819
    .
  2. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  3. AAVSO
    . Retrieved 2023-04-19.
  4. ^ "V* RZ Gru". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 February 2014.
  5. ^
    S2CID 116536811
    .
  6. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  7. doi:10.1093/mnras/196.1.91p
    .
  8. ^ Malatesta, Kerri (17 July 2010). "UX Ursae Majoris". Variable Star of the Season. Retrieved 26 January 2014.
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