NO Apodis

NO Apodis (HD 156513) is semi-regular pulsating star located in the far southern constellation Apus. It varies between magnitudes 5.71 and 5.95,[2] its pulsations of periods 26.2 and 26.6 days respectively.[4] Located around 780 ± 20 light-years distant,[3] it shines with a luminosity approximately 2059 times that of the Sun and has a surface temperature of 3568 K.[5]

NO Apodis
Observation data
Epoch J2000      Equinox J2000
Constellation Apus
Right ascension  17h 31m 27.465s[1]
Declination −80° 51 32.88[1]
Apparent magnitude (V) 5.71-5.95[2]
Characteristics
Spectral type M3III[2]
U−B color index 1.81
B−V color index 1.67
Variable type Semiregular pulsating Star
Astrometry
Radial velocity (Rv)-18.3 km/s
Proper motion (μ) RA: -3.926 ± 0.197[3] mas/yr
Dec.: -43.585 ± 0.214[3] mas/yr
Parallax (π)4.2033 ± 0.1296[3] mas
Distance780 ± 20 ly
(238 ± 7 pc)
Other designations
CD-80° 638, HD 156513, FK5 1455, HIP 85760, HR 6429, SAO 258769.
Database references
SIMBADdata

References

  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–64. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
  2. Watson, Christopher (25 August 2009). "NO Apodis". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 31 March 2015.
  3. 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.
  4. Tabur, V.; Bedding, T.R.; Kiss, L.L.; Moon, T.T.; Szeidl, B.; Kjeldsen, H. (2009). "Long-term photometry and periods for 261 nearby pulsating M giants". Monthly Notices of the Royal Astronomical Society. 400 (4): 1945–61. arXiv:0908.3228. Bibcode:2009MNRAS.400.1945T. doi:10.1111/j.1365-2966.2009.15588.x.
  5. McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.


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