HD 147513

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HD 147513
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scorpius
Right ascension 16h 24m 01.3s
Declination −39° 11′ 34.7″
Apparent magnitude (V) 5.38
Characteristics
Spectral type G1VH-04
U−B color index 0.15[1]
B−V color index 0.62[1]
Variable type suspected
Astrometry
Radial velocity (Rv) 10.1 km/s
Proper motion (μ) RA: 72.64 mas/yr
Dec.: 3.41 mas/yr
Parallax (π) 77.69 ± 0.86 mas
Distance 41.96 ly
(12.87 pc)
Details
Age 4 × 108[2] years
Other designations
62 G. Scorpii, CD -38°10983, CPD -38°6407, FK5 3295, GC 22030, Gliese 620.1, HIP 80337, HR 6094, NSV 7680, SAO 207622, Wo 9559

HD 147513 (62 G. Scorpii) is a 5th-magnitude star in the constellation of Scorpius. It was first catalogued by Italian astronomer Piazzi in his star catalogue as "XVI 55".[3]

It is a yellow dwarf star, similar to the Sun. However, it is slightly less massive and considerably younger, being only 400 million years old. It is approximately 40 light years away from Earth.

HD 147513 is also a suspected variable star.[4] have an observed separation of 5360 AU.[5]


The star is a sun like star of spectral class G3-5 and luminosity class V, an apparent visual magnitude of +5.39 and an absolute visual magnitude of +4.84. The visual luminosity of star A is 1.01 × the sun and it has a diameter of 1.08 Sol.

This star is a member of the Ursa Major moving group of stars that share a common proper motion through space. The atmosphere of the star is enriched in barium and deficient in carbon. This change in composition occurred when the companion passed through the asymptotic giant branch and contaminated this star's photosphere.[5]

The habitable zone for an Earthlike planet round this star would locate around 1.00A.U.s from the star and star B would appear as magnitude -2.85 object.

An extrasolar planet, designated HD 147513 Ab, which is at least as large as Jupiter, orbits component A in a highly eccentric orbit at a mean distance of 1.26AU. It was discovered on 18 June 2002.[6]

Component B[edit]

Component B is a star of spectral class of DA2. It has an apparent visual magnitude of +11.00. The habitable zone for an Earth-type planet round this star would be 0.076 A.U.s. and star A would appear as a magnitude -8.46 object.[citation needed]

Planetary system[edit]

In 2002, the Geneva Extrasolar Planet Search Team announced the discovery of an extrasolar planet orbiting the star.[7]

The HD 147513 system[7]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >1.21 MJ 1.32 528.4 ± 6.3 0.26 ± 0.05

See also[edit]

References[edit]

  1. ^ a b Hoffleit D., Warren Jr., W.H., The Bright Star Catalogue, 5th rev. ed. (preliminary version).[1]
  2. ^ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal 687 (2): 1264–1293. arXiv:0807.1686. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785. 
  3. ^ Piazzi, G., (ed.) the Palermo Catalogue, 1814.
  4. ^ NSV 7680 -- Variable Star - SIMBAD entry
  5. ^ a b Porto de Mello, G. F.; da Silva, L. "HR 6094: A Young, Solar-Type, Solar-Metallicity Barium Dwarf Star". Astrophysical Journal Letters 476: L89. Bibcode:1997ApJ...476L..89P. doi:10.1086/310504. 
  6. ^ http://solstation.com/stars2/hr6094ab.htm
  7. ^ a b Mayor, M. et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics 415 (1): 391–402. arXiv:astro-ph/0310316. Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250. 

External links[edit]

Coordinates: Sky map 16h 24m 01.2899s, −39° 11′ 34.729″