4 Camelopardalis

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Template:Short description

4 Camelopardalis
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 5.29[2]
Characteristics
Spectral type A3m[3]
U−B Template:Engvar 0.12[4]
B−V Template:Engvar Script error: No such module "val".[2]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: +52.892[1] mas/yr
Dec.: −140.618[1] mas/yr
Parallax (π)18.4464±0.1109 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)1.68[2]
Orbit[6]
PrimaryAa
CompanionAb
Period (P)90 yr
Semi-major axis (a)0.503″
Eccentricity (e)0.87
Inclination (i)120.0°
Longitude of the node (Ω)54.5°
Argument of periastron (ω)
(secondary)		235.9°
Details
Mass2.01[7] Template:Solar mass
RadiusScript error: No such module "val".[8] Template:Solar radius
Luminosity17.64[2] Template:Solar luminosity
Surface gravity (log g)3.98[9] cgs
Temperature7,700[9] K
Metallicity [Fe/H]+0.27[9] dex
Rotational velocity (v sin i)75[10] km/s
Age560[7] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[11]
Database references
SIMBADdata

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4 Camelopardalis is a probable multiple star in the northern constellation of Camelopardalis,[11] located 177 light years away from the Sun, based upon parallax.[1] With a combined apparent visual magnitude of 5.29,[2] it is visible to the naked eye as a faint, white-hued star. The pair have a relatively high proper motion, traversing the celestial sphere at an angular rate of Script error: No such module "val". per year.[12] The system's proper motion makes it a candidate for membership in the IC 2391 supercluster.[13] They are moving away from the Earth with a heliocentric radial velocity of 22.5 km/s.[5]

The brighter member, designated component A, is classified as an Am star, which indicates that the spectrum shows abnormalities of certain elements.[14] It is an estimated 560[7] million years old and is spinning with a projected rotational velocity of 75[10] The star has 2.01[7] times the mass of the Sun and 2.57[8] times the Sun's radius. It is radiating 18[2] times the Sun's luminosity from its photosphere at an effective temperature of 7,700 K.[9]

There is a faint, magnitude 9.49 companion at an angular separation of Script error: No such module "val". – component B; the pair most likely form a binary systemwith a period of about 90 years.[6] There is also a 13th-magnitude visual companion Script error: No such module "val". away which shares a common proper motion and parallax.[15][6] Another listed companion, a 12th-magnitude star nearly Script error: No such module "val". away, is probably unrelated.[16]

References

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  1. ↑ a b c d e f Template:Cite Gaia EDR3
  2. ↑ a b c d e f Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
  4. ↑ Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ a b c Script error: No such module "citation/CS1".
  7. ↑ a b c d Script error: No such module "citation/CS1".
  8. ↑ a b Template:Cite DR2
  9. ↑ a b c d Script error: No such module "citation/CS1".
  10. ↑ a b Script error: No such module "citation/CS1".
  11. ↑ a b Template:Cite simbad
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Template:Cite Gaia EDR3
  16. ↑ Template:Cite Gaia EDR3

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External links

Template:Stars of Camelopardalis

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