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Mu Ursae Majoris information


Mu Ursae Majoris
Diagram showing star positions and boundaries of the Ursa Major constellation and its surroundings
Diagram showing star positions and boundaries of the Ursa Major constellation and its surroundings

Location of μ Ursae Majoris (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ursa Major
Right ascension 10h 22m 19.73976s[1]
Declination +41° 29′ 58.2691″[1]
Apparent magnitude (V) +3.06[2]
Characteristics
Evolutionary stage AGB[3]
Spectral type M0 IIIab[2]
U−B color index +1.90[4]
B−V color index +1.59[4]
Variable type suspected[5]
Astrometry
Radial velocity (Rv)−21.30±1.66[6] km/s
Proper motion (μ) RA: –81.47[1] mas/yr
Dec.: +35.34[1] mas/yr
Parallax (π)14.16 ± 0.54 mas[1]
Distance230 ± 9 ly
(71 ± 3 pc)
Absolute magnitude (MV)−1.11±0.083[7]
Orbit[8]
Period (P)230.089 days
Semi-major axis (a)0.0028″
Eccentricity (e)0.061
Inclination (i)13.6°
Periastron epoch (T)2425577.030 JD
Argument of periastron (ω)
(secondary)
236.4°
Semi-amplitude (K1)
(primary)
7.40 km/s
Details
Mass6.3[9] M
Radius51.8+1.12
−1.17
[10] R
Luminosity542±31[10] L
Surface gravity (log g)1.0[6] cgs
Temperature3868±37[10] K
Metallicity [Fe/H]+0.00[11] dex
Rotational velocity (v sin i)7.5[6] km/s
companion
Mass0.96[9] M
Other designations
Tania Australis, Alkafzah al Thaniyah, μ Ursae Majoris, μ UMa, Mu UMa, 34 Ursae Majoris, BD+42 2115, FK5 386, GC 14232, HD 89758, HIP 50801, HR 4069, PPM 51850, SAO 43310
Database references
SIMBADdata

Mu Ursae Majoris (μ Ursae Majoris, abbreviated Mu UMa, μ UMa), formally named Tania Australis /ˈtniə ɔːˈstrlɪs/,[12][13] is a binary star in the constellation of Ursa Major. An apparent visual magnitude of +3.06[2] places it among the brighter members of the constellation. Parallax measurements give an estimated distance of roughly 230 light-years (71 parsecs) from the Sun, with a margin of error of 4%.[1]

  1. ^ a b c d e f Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference aaa352_495 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Eggen1992 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference aj135_1_209 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference park2013 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference ren was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference kraicheva1980 was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference baines2021 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference aaa338_623 was invoked but never defined (see the help page).
  12. ^ Kunitzsch, Paul; Smart, Tim (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations (2nd rev. ed.). Cambridge, Massachusetts: Sky Pub. ISBN 978-1-931559-44-7.
  13. ^ Cite error: The named reference IAU-CSN was invoked but never defined (see the help page).

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Mu Ursae Majoris

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Mu Ursae Majoris (μ Ursae Majoris, abbreviated Mu UMa, μ UMa), formally named Tania Australis /ˈteɪniə ɔːˈstreɪlɪs/, is a binary star in the constellation...

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Xi Ursae Majoris

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consisting of Xi Ursae Majoris, Iota Ursae Majoris, Kappa Ursae Majoris, Lambda Ursae Majoris, Mu Ursae Majoris and Nu Ursae Majoris. Consequently, the...

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Iota Ursae Majoris

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asterism consisting of ι Ursae Majoris, Kappa Ursae Majoris, Lambda Ursae Majoris, Mu Ursae Majoris, Nu Ursae Majoris and Xi Ursae Majoris. Consequently, the...

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Lambda Ursae Majoris

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consisting of Lambda Ursae Majoris, Iota Ursae Majoris, Kappa Ursae Majoris, Mu Ursae Majoris, Nu Ursae Majoris and Xi Ursae Majoris. Consequently, the...

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Nu Ursae Majoris

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consisting of Nu Ursae Majoris, Iota Ursae Majoris, Kappa Ursae Majoris, Lambda Ursae Majoris, Mu Ursae Majoris, and Xi Ursae Majoris. Consequently, the...

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Kappa Ursae Majoris

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consisting of Kappa Ursae Majoris, Iota Ursae Majoris, Lambda Ursae Majoris, Mu Ursae Majoris, Nu Ursae Majoris and Xi Ursae Majoris. Consequently, the...

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List of brightest natural objects in the sky

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Suspected variable star 3.45 Lambda Ursae Majoris Star 3.45 Eta Ceti Star 3.466 Epsilon Gruis Star 3.47 3.41 Sigma Canis Majoris Star 3.47 Gamma Sagittae Star...

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List of Arabic star names

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Eta Canis Majoris Alula Australis, Alula Borealis (al-Qafzat) ul-Ūla' the First (Leap) القفزة الأولى Xi Ursae Majoris and Nu Ursae Majoris Alya al-Alyah...

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List of Chinese star names

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Kappa Ursae Majoris Alkaphrah 上台二 Shàng Tái èr The Second Upper Step Lambda Ursae Majoris Tania Borealis 中台一 Zhōng Tái yī The First Middle Step Mu Ursae Majoris...

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Stellar classification

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Orionis B2Ib – 9 Cephei B3V – Eta Ursae Majoris B3V – Eta Aurigae B3Ia – Omicron2 Canis Majoris B5Ia – Eta Canis Majoris B8Ia – Rigel A-type stars are among...

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List of exoplanets detected by radial velocity

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MJ or 3.1 M🜨. The longest period of any confirmed exoplanet is 47 Ursae Majoris d, which takes 14002 days or 38.33 years to make one trip around the...

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Corona Australis

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around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona...

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Stellar kinematics

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the stars in the Plough / Big Dipper asterism except for α Ursae Majoris and η Ursae Majoris. This is sufficiently close that the Sun lies in its outer...

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List of nearest stars by spectral type

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Fugate, Robert Q. (1995-09-01). "Full Adaptive Optics Images of ADS 9731 and MU Cassiopeiae: Orbits and Masses". The Astrophysical Journal. 450: 380. Bibcode:1995ApJ...

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Discoveries of exoplanets

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its existence confirmed. It is a hot Jupiter with a 4.2-day orbit. 47 Ursae Majoris b: In 1996 this Jupiter-like planet was the first long-period planet...

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List of astronomy acronyms

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subclass UGSU – (celestial object) UG SU Ursae Majoris, a subclass of UG-type stars named after SU Ursae Majoris, the archetype for the subclass UGWZ –...

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List of multiplanetary systems

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S2CID 7424216. R. P. Butler; Marcy, Geoffrey W. (1996). "A Planet Orbiting 47 Ursae Majoris". Astrophysical Journal Letters. 464 (2): L153–L156. Bibcode:1996ApJ...

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Stars named after people

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middle name of Virgil Ivan "Gus" Grissom. Dnoces for the star Iota Ursae Majoris and which is Second spelled backwards, alluding to Edward Higgins White...

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List of proper names of exoplanets

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98 4200 2015 NameExoWorlds Taphao Thong Thai folktale character 47 Ursae Majoris (Chalawan) 2.53 1078 2.1 radial vel. 1996 45.9 1.03 5892 2015 NameExoWorlds...

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List of smallest known stars

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"Masses and Other Parameters of the Post-Common Envelope Binary BE Ursae Majoris". The Astrophysical Journal. 518 (2): 866–872. Bibcode:1999ApJ...518...

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