Lambda Mensae, Latinized from λ Mensae, is an orange-hued star in the southern constellation of Mensa. It has an apparent visual magnitude of 6.53,[2] which places it at or near the limit on stars visible to the naked eye. According to the Bortle scale, it requires a dark night from rural skies for this star to be viewed. Though it has the designation Lambda, it is actually the twenty-fourth-brightest star in the constellation and not the eleventh-brightest.
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Mensa |
Right ascension | 05h 47m 48.13340s[1] |
Declination | −72° 42′ 08.0993″[1] |
Apparent magnitude (V) | 6.53[2] |
Characteristics | |
Spectral type | K0 III[3] |
Apparent magnitude (B) | 7.614[4] |
Apparent magnitude (J) | 4.820[5] |
Apparent magnitude (H) | 4.163[5] |
Apparent magnitude (K) | 4.119[5] |
U−B color index | +0.97[2] |
B−V color index | +1.08[2] |
Astrometry | |
Radial velocity (Rv) | 15.35±0.13[6] km/s |
Proper motion (μ) | RA: -7.013[6] mas/yr Dec.: +24.451[6] mas/yr |
Parallax (π) | 6.9890 ± 0.0139 mas[6] |
Distance | 466.7 ± 0.9 ly (143.1 ± 0.3 pc) |
Absolute magnitude (MV) | +0.84[7] |
Details | |
Radius | 10[8] R☉ |
Luminosity | 54[9] L☉ |
Surface gravity (log g) | 2.43[10] cgs |
Temperature | 4,713[10] K |
Other designations | |
Database references | |
SIMBAD | data |
This is an evolved K-type giant star with a stellar classification of K0 III.[3] It is a red clump star, which means it is generating energy through helium fusion at its core.[5] The measured angular diameter is 0.68±0.01 mas.[12] At an estimated distance of the star, this yields a physical size of about 10 times the radius of the Sun.[8] It is radiating 54[9] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,713 K.[10]
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: CS1 maint: postscript (link)