Back الهقعة (نجم) Arabic Meissa AST ল্যাম্বডা অরিয়নিস Bengali/Bangla Meissa Catalan Meissa Czech Meissa German Meissa Spanish هقعه FA Lambda Orionis French מייסה HE
  | |
| 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] |
| Distance | approx. 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] |
| Distance | 1,320 ± 80 ly (410 ± 30 pc) |
| Absolute magnitude (MV) | −1.94 |
| Details | |
| A | |
| Mass | 34[7] M☉ |
| Radius | 13.4+3.9 −2.5[8] R☉ |
| Luminosity | 200,000+117,000 −74,000[8] L☉ |
| Surface gravity (log g) | 3.90[9] cgs |
| Temperature | 35,000+2,000 −1,500[8] K |
| Metallicity [Fe/H] | 0.03[9] dex |
| Age | 4.2[7] Myr |
| B | |
| Mass | 10.3±0.7[10] M☉ |
| Radius | 4.2±0.8[10] R☉ |
| Luminosity | 6,300[10] L☉ |
| Surface gravity (log g) | 4.21±0.10[10] cgs |
| Temperature | 25,400±500[10] K |
| Age | 1.8[10] Myr |
| Other designations | |
| A: HD 36861, HR 1879 | |
| B: HD 36862, HR 1880 | |
| Database references | |
| SIMBAD | λ 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.
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melnik2020was invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
edr3bwas invoked but never defined (see the help page). - ^ 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.
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mnras181_657was invoked but never defined (see the help page). - ^ 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.
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vosswas invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
aaa628_A36was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
wuwas invoked but never defined (see the help page). - ^ 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.
- ^ 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.