Theta Cancri

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Theta Cancri
Location of θ Cancri (circled)
Observation data
ICRS
)
Constellation Cancer[1]
Right ascension 08h 31m 35.730s[2]
Declination +18° 05′ 39.91″[2]
Apparent magnitude (V) +5.323[3]
Characteristics
Spectral type K5 III[4]
U−B color index +1.949[3]
B−V color index +1.565[3]
Distance
432 ± 6 ly
(132 ± 2 pc)
Absolute magnitude (MV)−0.19[1]
Details
Radius40.02+2.22
−2.35[6] R☉
Luminosity353.1±10.1[6] L☉
Surface gravity (log g)4.41+0.79
−0.24[2] cgs
Temperature4,600+4
−11[2] K
HR 3357, SAO 97881[7]
Database references
SIMBADdata

Theta Cancri, is a

apparent visual magnitude of +5.32.[3] The system is located at a distance of approximately 432 light-years (132 pc) from the Sun, based on parallax,[2] and is drifting further away with a radial velocity of +44 km/s.[5] Since it is near the ecliptic, it can be occulted by the Moon[9] and, very rarely, by planets
.

The primary, designated component A, is

luminosity of the Sun at an effective temperature of 4,600 K.[2]

In Chinese astronomy, Ghost (Chinese: 鬼宿; pinyin: Guǐ Xiù) refers to an asterism consisting of Theta Cancri, Eta Cancri, Gamma Cancri and Delta Cancri.[10] Theta Cancri is the first star of Ghost (Chinese: 鬼宿一; pinyin: Guǐ Xiù yī), as it is also the determinative star for that asterism.[11]

References

  1. ^
    doi:10.1134/S1063773712050015
    . XHIP record for this object at VizieR.
  2. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  3. ^
    Bibcode:1966PDAUC...1....1G
    .
  4. ^
    S2CID 14878976
    .
  5. ^
    S2CID 59451347
    , A61.
  6. ^
    doi:10.1051/0004-6361/201833051 Gaia DR2 record for this source at VizieR
    .
  7. ^ "tet Cnc", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2017-06-19.
  8. doi:10.1086/131309
    .
  9. doi:10.1086/114513
    .
  10. ISBN 978-986-7332-25-7
    .
  11. ISBN 978-986-7332-25-7
    .
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