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Star system in the constellation Perseus
θ Persei
Location of θ Persei (circled)
Observation data
Epoch J2000
Equinox J2000
Constellation
Perseus
Right ascension
02h 44m 11.98704s
[1]
Declination
+49° 13′ 42.4111″
[1]
Apparent magnitude (V)
4.11
[2] / 9.987
[3]
Characteristics
θ Per A
Evolutionary stage
Main sequence
Spectral type
F8 V
[4]
U−B
color index
+0.00
[5]
B−V
color index
+0.49
[5]
θ Per B
Spectral type
M1.5 V
[6]
B−V
color index
+1.48
[7]
Astrometry
Radial velocity (Rv ) +24.32
[8] km/s
Proper motion (μ)
RA: +334.66
[1]
mas /
yr
Dec.: -89.99
[1]
mas /
yr
Parallax (π) 89.87 ± 0.22
mas
[1]
Distance 36.29 ± 0.09
ly (11.13 ± 0.03
pc )
Absolute magnitude (MV ) 3.88
[9]
Orbit
[10]
Period (P) 2,720
yr
Semi-major axis (a) 22.289″
Eccentricity (e) 0.13
Inclination (i) 75.44°
Longitude of the node (Ω) 128°
Periastron
epoch (T) B 1613
Argument of periastron (ω) (secondary)100.64°
Details θ Per A
Mass 1.138± 0.010
[11]
M ☉
Radius 1.319± 0.011
[11]
R ☉
Luminosity 2.235± 0.040
[11]
L ☉
Surface gravity (log g ) 4.43± 0.17
[12]
cgs
Temperature 6,328± 86
[12]
K
Metallicity [Fe/H] −0.03± 0.09
[12]
dex
Age 4.0± 0.4
[11]
Gyr θ Per B
Mass 0.521± 0.052
[3]
M ☉
Radius 0.498± 0.017
[3]
R ☉
Temperature 3,685± 60
[3]
K
Metallicity [Fe/H] −0.03± 0.09
[12]
dex
Age 2.4
[3]
Gyr
Other designations
θ Per,
BD +48°746,
GJ 107,
CCDM J02441+4913,
IDS 02374+4848,
WDS J02442+4914
θ Per A :
13 Persei,
HR 799,
HD 16895,
HIP 12777,
FK5 93,
GC 3277,
PPM 45428,
SAO 38288θ Per B :
2MASS J02441025+4913540
Database references
SIMBAD
θ Per
θ Per A
θ Per B
Theta Persei (Theta Per , θ Persei , θ Per ) is a
star system 37
light years away from
Earth , in the constellation
Perseus . It is one of the
closest naked-eye stars.
The primary star is a yellowish
dwarf (main sequence) star of
spectral type F8V, which is somewhat larger and brighter than the Sun, but still within the range considered to have the potential for Earth-like planets. There is also a red dwarf
companion of spectral type M1.V, orbiting about 250
AU from the primary. It has a
Gaia Data Release 2 parallax of 89.2871± 0.1534
mas , corresponding to a distance of 11.2
pc .
[13]
An 11th-magnitude star is listed in double-star catalogues as component C of the multiple system. It was 95
″ away from component A in 2002,
[14] although the separation is rapidly increasing as it is a distant background object with a very different
proper motion to the other two stars.
[15] An unconfirmed companion, possibly a brown dwarf, was reported 6.2
″ from θ Persei B in 2010.
[16]
References
^
a
b
c
d
e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653–664,
arXiv :
0708.1752 ,
Bibcode :
2007A&A...474..653V ,
doi :
10.1051/0004-6361:20078357 ,
S2CID
18759600 .
^ Van Belle, Gerard T.; von Braun, Kaspar (2009).
"Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars" . The Astrophysical Journal . 694 (2): 1085–1098.
arXiv :
0901.1206 .
Bibcode :
2009ApJ...694.1085V .
doi :
10.1088/0004-637X/694/2/1085 .
^
a
b
c
d
e Mann, Andrew W.; Feiden, Gregory A.; Gaidos, Eric; Boyajian, Tabetha; von Braun, Kaspar (2015). "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius". The Astrophysical Journal . 804 (1): 38.
arXiv :
1501.01635 .
Bibcode :
2015ApJ...804...64M .
doi :
10.1088/0004-637X/804/1/64 .
S2CID
19269312 .
^ Abt, H. A. (1981). "Visual multiples. VII. MK classifications". The Astrophysical Journal Supplement Series . 45 : 437.
Bibcode :
1981ApJS...45..437A .
doi :
10.1086/190719 .
^
a
b Hoffleit, D.; Jaschek, C. (1991). The Bright Star Catalogue . New Haven: Yale University Observatory.
Bibcode :
1991bsc..book.....H .
^ Alonso-Floriano, F. J.; Morales, J. C.; Caballero, J. A.; Montes, D.; Klutsch, A.; Mundt, R.; Cortés-Contreras, M.; Ribas, I.; Reiners, Ansgar; Amado, P. J.; Quirrenbach, A.; Jeffers, S. V. (2015).
"CARMENES input catalogue of M dwarfs" (PDF) . Astronomy & Astrophysics . 577 : A128.
arXiv :
1502.07580 .
Bibcode :
2015A&A...577A.128A .
doi :
10.1051/0004-6361/201525803 .
S2CID
53135130 . [
permanent dead link ]
^ Weis, Edward W. (1999).
"Photometry of Late Dwarf Stars" . The Astronomical Journal . 117 (6): 3021–3024.
Bibcode :
1999AJ....117.3021W .
doi :
10.1086/300900 .
^ Nidever, David L.; et al. (August 2002), "Radial Velocities for 889 Late-Type Stars", The Astrophysical Journal Supplement Series , 141 (2): 503–522,
arXiv :
astro-ph/0112477 ,
Bibcode :
2002ApJS..141..503N ,
doi :
10.1086/340570 ,
S2CID
51814894 .
^ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics , 501 (3): 941–947,
arXiv :
0811.3982 ,
Bibcode :
2009A&A...501..941H ,
doi :
10.1051/0004-6361/200811191 ,
S2CID
118577511 .
^ Boulé, Cory; Andrews, Kaitlyn; Penfield, Andrew; Puckette, Ian; Goodale, Keith A.; Harfenist, Steven A. (2017).
"Determining Binary Star Orbits Using Kepler's Equation" (PDF) . Journal of Double Star Observations . 13 (2): 189.
Bibcode :
2017JDSO...13..189B .
^
a
b
c
d Boyajian, Tabetha S.; et al. (February 2012), "Stellar Diameters and Temperatures. I. Main-sequence A, F, and G Stars", The Astrophysical Journal , 746 (1): 101,
arXiv :
1112.3316 ,
Bibcode :
2012ApJ...746..101B ,
doi :
10.1088/0004-637X/746/1/101 ,
S2CID
18993744 . See Table 10, 12.
^
a
b
c
d Bonfils, Xavier; Delfosse, Xavier; Udry, Stéphane; Santos, Nuno C.; Forveille, Thierry; Ségransan, Damien (2005).
"Metallicity of M dwarfs. I. A photometric calibration and the impact on the mass-luminosity relation at the bottom of the main sequence" .
Astronomy and Astrophysics . 442 (2): 635–642.
arXiv :
astro-ph/0503260 .
Bibcode :
2005A&A...442..635B .
doi :
10.1051/0004-6361:20053046 .
S2CID
13900901 .
^
Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018).
"Gaia Data Release 2: Summary of the contents and survey properties" .
Astronomy & Astrophysics . 616 . A1.
arXiv :
1804.09365 .
Bibcode :
2018A&A...616A...1G .
doi :
10.1051/0004-6361/201833051 .
Gaia DR2 record for this source at
VizieR .
^ Mason, Brian D.; et al. (December 2001), "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog", The Astronomical Journal , 122 (6): 3466–3471,
Bibcode :
2001AJ....122.3466M ,
doi :
10.1086/323920
^
Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018).
"Gaia Data Release 2: Summary of the contents and survey properties" .
Astronomy & Astrophysics . 616 . A1.
arXiv :
1804.09365 .
Bibcode :
2018A&A...616A...1G .
doi :
10.1051/0004-6361/201833051 .
Gaia DR2 record for this source at
VizieR .
^ Tanner, Angelle M.; Gelino, Christopher R.; Law, Nicholas M. (2010). "A High-Contrast Imaging Survey ofSIM Lite Planet Search Targets". Publications of the Astronomical Society of the Pacific . 122 (896): 1195–1206.
arXiv :
1007.4315 .
Bibcode :
2010PASP..122.1195T .
doi :
10.1086/656481 .
S2CID
118459054 .
External links