48 Cassiopeiae

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48 Cassiopeiae
Observation data
Epoch J2000      Equinox J2000
Constellation Cassiopeia[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 4.49[1]
Characteristics
Spectral type A3 Va[3] (A2 V + F2 V)[4]
B−V Template:Engvar Template:Val[1]
Astrometry
Radial velocity (Rv)−12.4[5] km/s
Proper motion (μ) RA: −55.69[2] mas/yr
Dec.: −8.71[2] mas/yr
Parallax (π)28.36±0.44 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)1.75[1]
Orbit[6]
Primary48 Cas A
Companion48 Cas B
Period (P)Template:Val yr
Semi-major axis (a)Template:Val″
Eccentricity (e)Template:Val
Inclination (i)Template:Val°
Longitude of the node (Ω)Template:Val°
Periastron epoch (T)Template:Val
Argument of periastron (ω)
(secondary)		Template:Val°
Details
48 Cas A
Mass1.93[7] Template:Solar mass
LuminosityTemplate:Val[8] Template:Solar luminosity
Surface gravity (log g)4.47[9] cgs
TemperatureTemplate:Val[9] K
Metallicity [Fe/H]−0.4[5] dex
Rotational velocity (v sin i)61[8] km/s
Age376[9] Myr
48 Cas B
Mass1.17[7] Template:Solar mass
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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48 Cassiopeiae is a triple star[11][7] system in the northern constellation of Cassiopeia. It is visible to the naked eye with a combined apparent visual magnitude of 4.49.[1] With an annual parallax shift of Template:Val as seen from Earth's orbit, it is located approximately 115 light years away.[2] The system is moving closer with a heliocentric radial velocity of −12.4 km/s.[5]

The primary component, designated 48 Cassiopeiae A, is a white A-type main-sequence star with a stellar classification of A2 V[4] and an apparent magnitude of +4.65.[12] It has a companion, component B, which is an F-type main-sequence star of class F2 V[4] and an apparent magnitude of +6.74.[12] This pair orbit around their common centre of mass once every 61.1 years.[6] They have a semimajor axis of 0.614 arcseconds and an eccentricity of 0.355.[6] A third companion, component C, is a magnitude 13.20[12] star located at an angular separation of 23.16 arcseconds as of 2014, or at least 816.5 AU away.[7]

48 Cassiopeiae also has the Bayer designation A Cassiopeiae, the only star with a Latin letter designation in the constellation.[13]

References

Template:Reflist

Template:Stars of Cassiopeia

  1. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  2. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named vanLeeuwen2007
  3. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Gray1989
  4. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Edwards1976
  5. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named gebran2016
  6. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Hartkpof2006
  7. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named derosa2014
  8. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named zorec2012
  9. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named David2015
  10. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
  11. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Eggleton2008
  12. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named WDSC2014
  13. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named cross
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