Meissa

Meissa
λ (circled) in the constellation Orion.
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
A
Right ascension 05h 35m 08.27608s[1]
Declination +09° 56′ 02.9913″[1]
Apparent magnitude (V) 3.7[2]
B
Right ascension 05h 35m 08.48130s[3]
Declination +09° 56′ 06.0995″[3]
Apparent magnitude (V) 5.6[2]
Characteristics
A
Spectral type O8 III((f))[4]
U−B color index −1.01[5]
B−V color index −0.21[5]
B
Spectral type B0 V[5]
U−B color index −0.77[5]
B−V color index +0.04[5]
Astrometry
Radial velocity (Rv)+30.10[6] km/s
A
Proper motion (μ) RA: +2.896[1] mas/yr
Dec.: −3.183[1] mas/yr
Parallax (π)2.5936 ± 0.4032 mas[1]
Distanceapprox. 1,300 ly
(approx. 390 pc)
Absolute magnitude (MV)−4.25
B
Proper motion (μ) RA: +2.216[3] mas/yr
Dec.: −1.986[3] mas/yr
Parallax (π)2.4682 ± 0.1543 mas[3]
Distance1,320 ± 80 ly
(410 ± 30 pc)
Absolute magnitude (MV)−1.94
Details
A
Mass34[7] M☉
Radius13.4+3.9
−2.5[8] R☉
Luminosity200,000+117,000
−74,000[8] L☉
Surface gravity (log g)3.90[9] cgs
Temperature35,000+2,000
−1,500[8] K
Metallicity [Fe/H]0.03[9] dex
Age4.2[7] Myr
B
Mass10.3±0.7[10] M☉
Radius4.2±0.8[10] R☉
Luminosity6,300[10] L☉
Surface gravity (log g)4.21±0.10[10] cgs
Temperature25,400±500[10] K
Age1.8[10] Myr
Other designations
λ Orionis, 39 Orionis, 101 G. Orionis, BD+09°879, HIP 26207, SAO 112921
A: HD 36861, HR 1879
B: HD 36862, HR 1880
Database references
SIMBADλ Ori
A
B

Meissa /ˈmaɪsə/, designated Lambda Orionis (λ Orionis, abbreviated Lambda Ori, λ Ori) is a star in the constellation of Orion. It is a multiple star approximately 1,300 ly away with a combined apparent magnitude of 3.33.[11] The main components are an O8 giant star and a B-class main sequence star, separated by about 4″. Despite Meissa being more luminous and only slightly further away than Rigel, it appears 3 magnitudes dimmer at visual wavelengths, with much of its radiation emitted in the ultraviolet due to its high temperature.

  1. ^ a b c d e Cite error: The named reference edr3a was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference melnik2020 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference edr3b was invoked but never defined (see the help page).
  4. ^ Sota, A.; Maíz Apellániz, J.; Walborn, N. R.; Alfaro, E. J.; Barbá, R. H.; Morrell, N. I.; Gamen, R. C.; Arias, J. I. (2011). "The Galactic O-Star Spectroscopic Survey. I. Classification System and Bright Northern Stars in the Blue-violet at R ~ 2500". The Astrophysical Journal Supplement. 193 (2): 24. arXiv:1101.4002. Bibcode:2011ApJS..193...24S. doi:10.1088/0067-0049/193/2/24. S2CID 119248206.
  5. ^ a b c d e Cite error: The named reference mnras181_657 was invoked but never defined (see the help page).
  6. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  7. ^ a b Cite error: The named reference voss was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference aaa628_A36 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference wu was invoked but never defined (see the help page).
  10. ^ a b c d e f Lyubimkov, Leonid S.; Rachkovskaya, Tamara M.; Rostopchin, Sergey I.; Lambert, David L. (2002). "Surface abundances of light elements for a large sample of early B-type stars - II. Basic parameters of 107 stars". Monthly Notices of the Royal Astronomical Society. 333 (1): 9–26. Bibcode:2002MNRAS.333....9L. doi:10.1046/j.1365-8711.2002.05341.x.
  11. ^ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue ofStellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.