WASP-55

Coordinates: Sky map 13h 35m 01.9538s, −17° 30′ 12.5263″
Source: Wikipedia, the free encyclopedia.
WASP-55
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 13h 35m 01.9538s[1]
Declination −17° 30′ 12.5263″[1]
Apparent magnitude (V) 11.75
Characteristics
Evolutionary stage Main sequence[citation needed]
Spectral type G1
Distance
980 ± 10 ly
(300 ± 4 pc)
Details
Gyr
TYC 6125-113-1, 2MASS J13350194-1730124[4]
Database references
SIMBADdata

WASP-55 is a G-type main-sequence star about 980 light-years away. The star is much younger than the Sun at approximately 1.1+0.8
−0.6 billion years.[3] WASP-55 is similar to the Sun in concentration of heavy elements.[2]

A multiplicity survey in 2016 found one candidate stellar companion to WASP-55 at a projected separation of 4.435

″.[5] Follow-up observations in 2017 were unable to confirm if the suspected companion red dwarf star, with a temperature of 3,340±90 K, is gravitationally bound to WASP-55 or not.[6]

Planetary system

In 2012 a

b was detected on a tight, circular orbit.[7] Its equilibrium temperature is 1,305 K.[8]

The WASP-55 planetary system[9]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b
 		0.62±0.04 MJ 0.0558±0.0006[8] 4.4656291 <0.1 89.0±0.2[8]° 1.34±0.01[8] RJ

References

  1. ^
    doi:10.1051/0004-6361/201833051 Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 55674757
  3. ^
    doi:10.1093/mnras/stw279
  4. ^ "WASP-55", SIMBAD, Centre de données astronomiques de Strasbourg
  5. S2CID 14215845
  6. S2CID 53400492
  7. S2CID 54713354
  8. ^
    S2CID 119077382
  9. doi:10.1093/mnras/stz2348


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