NO Aurigae

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NO Aurigae
Location of NO Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 40m 42.050s[1]
Declination +31° 55′ 14.20″[1]
Apparent magnitude (V) 6.21[2] (6.06 - 6.44[3])
Characteristics
Evolutionary stage Asymptotic giant branch[4]
Spectral type M2S Iab[3]
U−B color index +2.22[5]
B−V color index +2.09[5]
R−I color index +1.41[5]
Variable type LC[3]
Distance
approx. 3,500 ly
(approx. 1,100 pc)
Absolute magnitude (MV)−5.88[2]
Details
Mass4.93[7] M☉
Radius269[8] R☉
Luminosity9,075[8] L☉
Surface gravity (log g)−0.037[8] cgs
Temperature3,435[8] K
HIP 26718, HR 1939, SAO
 58322
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

NO Aurigae is a pulsating

light years
away.

Variability

A light curve for NO Aurigae plotted from Hipparcos data[9]

NO Aurigae is listed in the General Catalogue of Variable Stars as a slow irregular variable, indicating that no regularity could be found in the brightness variations. Other studies have suggested possible periods of 102.1, 173, and 226 days, and would classify it as a semiregular variable star.[10] The maximum visual magnitude range is 6.05–6.50.[10]

Properties

Most studies of NO Aurigae treat it as a red supergiant member of the Auriga OB1 stellar association at about 1.4 kpc.[11][12] On this basis it would have a luminosity around 67,000 L☉ and a radius around 630 R☉.[2][11]

NO Aurigae is an

Asymptotic Giant Branch stars which can appear with supergiant spectra due to their large size and low mass.[4] Possible detection of Technetium in the spectrum is a symptom of the third dredge-up which occurs only in late AGB stars.[12]

References

  1. ^
    doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR
    .
  2. ^
    S2CID 15109583
    .
  3. ^
    Bibcode:2009yCat....102025S
    .
  4. ^
    S2CID 14294870
    .
  5. ^
    Bibcode:2002yCat.2237....0D
    .
  6. S2CID 17804304
    .
  7. S2CID 111387483
    .
  8. ^
    S2CID 73594365
    .
  9. ^ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  10. ^
    Bibcode:2006SASS...25...47W
    .
  11. ^
    S2CID 119276502
    .
  12. ^
    S2CID 17789027
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=NO_Aurigae&oldid=1216804809"