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Iota Pictoris
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Pictor
	ι Pic A
Right ascension	04h 50m 55.32684s
Declination	−53° 27′ 41.2300″
Apparent magnitude (V)	5.63
	ι Pic B
Right ascension	04h 50m 56.49825s
Declination	−53° 27′ 34.9159″
Apparent magnitude (V)	6.47
Characteristics
ι Pic A
Spectral type	F0 V
U−B color index	0.06
B−V color index	0.32
ι Pic B
Spectral type	F4 V
B−V color index	0.37
Astrometry
ι Pic A
Radial velocity (Rv)	8.6±3.4 km/s
Proper motion (μ)	RA: −98.707 mas/yr ; Dec.: +80.769 mas/yr
Parallax (π)	24.9211 ± 0.1559 mas
Distance	130.9 ± 0.8 ly ; (40.1 ± 0.3 pc)
Absolute magnitude (MV)	2.50
ι Pic B
Radial velocity (Rv)	23.3±1.0 km/s
Proper motion (μ)	RA: −98.707 mas/yr ; Dec.: +66.139 mas/yr
Parallax (π)	25.6610 ± 0.4106 mas
Distance	127 ± 2 ly ; (39.0 ± 0.6 pc)
Absolute magnitude (MV)	3.30
Details
ι Pic A
Mass	1.51 M☉
Radius	1.80+0.23; −0.11 R☉
Luminosity	7.2±0.1 L☉
Surface gravity (log g)	4.28±0.14 cgs
Temperature	7,331±249 K
Age	696 Myr
ι Pic B
Mass	2.76 M☉
Radius	1.48+0.04; −0.06 R☉
Luminosity	3.4±0.06 L☉
Surface gravity (log g)	4.24±0.14 cgs
Temperature	6,435±219 K
Age	516 Myr
Other designations
	ι Pic, CPD−53° 760, WDS J04509-5328AB
	ι Pic A: HD 31203, HIP 22531, HR 1563, SAO 233709
	ι Pic B: HD 31204, HIP 22534, HR 1564, SAO 233710
Database references
SIMBAD	data

ι Pictoris, Latinized from Iota Pictoris, is a suspected multiple star system^[6] in the southern Pictor constellation. It is visible to the naked eye as a dim, yellow-white-hued point of light with a combined apparent visual magnitude of 5.28.^[6] The two resolvable components have an angular separation of 8.2 arcseconds, equivalent to a physical projected separation of around 450 AU.^[7] They are located at a distance of around 127–131 light-years from the Sun, based on parallax.^[1]

The two visible components appear as F-type main-sequence stars: the magnitude 5.63 component A has a stellar classification of F0 V, while the cooler, fainter secondary is of class F4 V.^[2] Both are themselves are suspected spectroscopic binary stars consisting of roughly equal components.^[6] Component B actually has a higher estimated mass than Component A, although the radius of B is smaller. They are both more luminous than the Sun, and have an estimated age of around 500–600 million years.^[4]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o 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.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Corbally, C. J. (1984), "Close visual binaries. I - MK classifications", Astrophysical Journal Supplement Series, 55: 657, Bibcode:1984ApJS...55..657C, doi:10.1086/190973.
^ ^a ^b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
^
"iot Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-21.{{cite web}}: CS1 maint: postscript (link)
- "* iot Pic A". SIMBAD. Centre de données astronomiques de Strasbourg.
- "* iot Pic B". SIMBAD. Centre de données astronomiques de Strasbourg.
^ ^a ^b ^c Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
^ Tokovinin, Andrei; et al. (August 2010), "Subsystems in Nearby Solar-type Wide Binaries", The Astronomical Journal, 140 (2): 510–517, arXiv:1006.1253, Bibcode:2010AJ....140..510T, doi:10.1088/0004-6256/140/2/510, S2CID 73629363.

[GaiaDR-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o 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.

[corbally1984-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Corbally, C. J. (1984), "Close visual binaries. I - MK classifications", Astrophysical Journal Supplement Series, 55: 657, Bibcode:1984ApJS...55..657C, doi:10.1086/190973.

[deBruijne2012-3] Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.

[David2015-4] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.

[SIMBAD-5] "iot Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-21.{{cite web}}: CS1 maint: postscript (link)
"* iot Pic A". SIMBAD. Centre de données astronomiques de Strasbourg.

"* iot Pic B". SIMBAD. Centre de données astronomiques de Strasbourg.

[6] "* iot Pic A". SIMBAD. Centre de données astronomiques de Strasbourg.

[7] "* iot Pic B". SIMBAD. Centre de données astronomiques de Strasbourg.

[Eggleton2008-6] Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.

[Tokovinin2010-7] Tokovinin, Andrei; et al. (August 2010), "Subsystems in Nearby Solar-type Wide Binaries", The Astronomical Journal, 140 (2): 510–517, arXiv:1006.1253, Bibcode:2010AJ....140..510T, doi:10.1088/0004-6256/140/2/510, S2CID 73629363.

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