R Normae

R Normae

The visual band light curve of R Normae, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Norma
Right ascension 15h 35m 57.35429s[2]
Declination −49° 30′ 28.6817″[2]
Apparent magnitude (V) 7.69[3] (6.5–12.8)[4]
Characteristics
Spectral type M3-7[5]
U−B color index +1.33[3]
B−V color index +1.77[3]
Variable type Mira[5]
Astrometry
Radial velocity (Rv)−22.0[6] km/s
Proper motion (μ) RA: −0.63[2] mas/yr
Dec.: −7.09[2] mas/yr
Parallax (π)1.72 ± 2.79 mas[2]
Distance2,900 ly (900 pc)[7] ly
Details
Luminosity7,764[8] L☉
Temperature3,161[8] K
Other designations
R Nor, CD−49°9787, GC 20939, GSC 08304-00824, HD 138743, HIP 76377, HIC 76377, SAO 225948.[9]
Database references
SIMBADdata

R Normae is a Mira variable star located near Eta Normae[10] in the southern constellation of Norma. This is an intermediate-mass red giant star that is generating part of its energy through hydrogen fusion. Because this fusion is thought to be occurring under conditions of convection, it is generating an excess of lithium.[11] The star ranges from magnitude 6.5 to 12.8 and has a relatively long period of 496 days.[4] Located around 2,900[7] light-years distant, it shines with a luminosity 7764 times that of the Sun and has a surface temperature of 3161 K.[8]

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  2. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference ubv was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference AAVSOR was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Uttenthaler was invoked but never defined (see the help page).
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  7. ^ a b Cite error: The named reference mnras319_3_728 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Mcdonald was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Arnold was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference uttenthaler was invoked but never defined (see the help page).