Iota Cancri

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Template:Short description

ι Cancri
Template:Location mark
Location of ι Cancri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer[1]
ι Cnc A
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 4.03[1]
ι Cnc B
Right ascension Template:RA[3]
Declination Template:DEC[3]
Apparent magnitude (V) 6.58[4]
Characteristics
ι Cnc A
Spectral type G8IIIa Ba0.2[5]
B−V Template:Engvar 1.007±0.015[1]
ι Cnc B
Spectral type A2V[6]
B−V Template:Engvar 0.051±0.008[4]
Astrometry
ι Cnc A
Radial velocity (Rv)15.74±0.13[7] km/s
Proper motion (μ) RA: −22.070 mas/yr[2]
Dec.: −43.699 mas/yr[2]
Parallax (π)9.4124±0.1621 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−0.79[8]
ι Cnc B
Radial velocity (Rv)25.00±1.5[9] km/s
Proper motion (μ) RA: −24.397 mas/yr[3]
Dec.: −44.250 mas/yr[3]
Parallax (π)9.6720±0.0362 mas[3]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Details
ι Cnc A
Mass2.376±0.011[10] Template:Solar mass
Radius21[7] Template:Solar radius
Luminosity204[7] Template:Solar luminosity
Surface gravity (log g)2.5[7] cgs
Temperature4,954[8] K
Metallicity [Fe/H]−0.14[7] dex
ι Cnc B
Mass2.113±0.035[10] Template:Solar mass
Radius1.94±0.05[11] Template:Solar radius
Luminosity24.9±1.2[11] Template:Solar luminosity
Surface gravity (log g)4.23±0.06[11] cgs
Temperature9,259±139[11] K
Metallicity [Fe/H]{{{metal_fe2}}} dex
Rotational velocity (v sin i)170[12] km/s
Age263[13] Myr
Other designations
Template:Odlist[14]
Iota Cancri A: Template:Odlist[14]
Iota Cancri B: Template:Odlist[15]
Database references
SIMBADdata

Script error: No such module "Check for unknown parameters".

Iota Cancri is a double star in the constellation Cancer. Its name is a Bayer designation that is Latinized from ι Cancri, and abbreviated Iota Cnc or ι Cnc. The brighter component is located at a distance of approximately Script error: No such module "convert". from Earth based on parallax measurements, and is drifting further away with a line of sight velocity of 16 km/s.[7]

The two stars of ι Cancri are separated by 30.5 arcseconds as of 2019, corresponding to a projected separation of Template:Cvt.[10] Although no orbit has been derived, the pair show a large common proper motion and are assumed to be gravitationally related.[16]

Properties

File:Iota Cancri.jpg
ι Cancri A (right) and B (Jeffrey Fisher)

The brighter star, ι Cancri A, is a yellow G-type giant with a stellar classification of G8IIIa Ba0.2[5] and an apparent visual magnitude of +4.03.[1] The suffix notation 'Ba0.2' indicates this is a mild barium star, thought to be caused by mass transfer of enriched material from an asymptotic giant branch star onto a less evolved companion. No such donor has been detected in the ι Cancri system, but it is assumed that there is an unseen white dwarf.[17]

This star has 2.4[10] times the mass of the Sun and has expanded to 21 times the Sun's radius.[7] It is radiating 204[7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,954 K.[8]

The fainter of the two stars, ι Cancri B, is a white A-type main-sequence star with a class of A2V[6] and an apparent magnitude of +6.58.[4] The star has 2.1[10] times the Sun's mass and 1.9 times the Sun's radius.[11] It is radiating 25 times the luminosity of the Sun from its photosphere at an effective temperature of 9,259 K.[11] With an estimated age of 263[13] million years, it is spinning rapidly with a projected rotational velocity of 170 km/s.[12] This is a shell star, surrounded by material expelled by its rapid rotation.[18]

References

<templatestyles src="Reflist/styles.css" />

  1. ↑ a b c d Template:Cite XHIP
  2. ↑ a b c d Template:Cite Gaia DR3
  3. ↑ a b c d Template:Cite Gaia DR3
  4. ↑ a b c Template:Cite XHIP
  5. ↑ a b Script error: No such module "Citation/CS1".
  6. ↑ a b Script error: No such module "Citation/CS1".
  7. ↑ a b c d e f g h Script error: No such module "Citation/CS1".
  8. ↑ a b c Script error: No such module "Citation/CS1".
  9. ↑ Script error: No such module "Citation/CS1".
  10. ↑ a b c d e Script error: No such module "Citation/CS1".
  11. ↑ a b c d e f Script error: No such module "Citation/CS1".
  12. ↑ a b Script error: No such module "Citation/CS1".
  13. ↑ a b Script error: No such module "Citation/CS1".
  14. ↑ a b Template:Cite simbad
  15. ↑ Template:Cite simbad
  16. ↑ Script error: No such module "Citation/CS1".
  17. ↑ Script error: No such module "Citation/CS1".
  18. ↑ Script error: No such module "Citation/CS1".

Script error: No such module "Check for unknown parameters".

Template:Stars of Cancer

Retrieved from "http://debianws.lexgopc.com/wiki143/index.php?title=Iota_Cancri&oldid=2078302"