SIPS 1259-4336

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SIPS 1259-4336
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 12h 59m 04.71s
Declination −43° 36′ 24.4″
Characteristics
Evolutionary stage main-sequence star
Spectral type M7.5[1]
Apparent magnitude (V) 18.01
Apparent magnitude (R) 15.74
Apparent magnitude (J) 10.53
Astrometry
Proper motion (μ) RA: 1102.919[2] mas/yr
Dec.: -264.536[2] mas/yr
Parallax (π)129.4288 ± 0.0620[2] mas
Distance25.20 ± 0.01 ly
(7.726 ± 0.004 pc)
Other designations
Gaia DR2 6135947032490329472, 2MASS J12590470-4336243
Database references
SIMBADdata

SIPS 1259-4336 is a red dwarf star first documented in 2005, in the constellation Centaurus. It is located around 25 light-years from Earth.

History of observations[]

Discovery of SIPS 1259-4336 was published in 2005 by Deacon et al. The star was detected by its high proper motion from the Southern Infrared Proper Motion Survey (SIPS).[3]

The star was originally incorrectly thought to be 11.8 light-years from Earth. However, two later sets of observations found it to be at just over 25 light-years, and one of these - the Gaia spacecraft observation - has a much smaller margin of error.

Distance[]

Later distance estimates of the star, besides trigonometric parallax with high uncertainty from the star's discovery paper,(276±41 mas[3]) include a parallax of "~128 mas" without specific error range from Burgasser et al. (2015). Its cross-references, including for parallax, were the 2005 discovery paper and T. Henry, priv. comm.[4] In independent agreement with the latter, Gaia's Data Release 2 gives a parallax of 129.0505±0.1398 mas.[5]

Variability[]

The brightness of the star shows a dimming trend, with period in excess of ten years.[1]

References[]

  1. ^ a b The Solar Neighborhood XLIV: RECONS Discoveries within 10 Parsecs, 2018, arXiv:1804.07377
  2. ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
  3. ^ a b Deacon, N. R.; Hambly, N. C.; Cooke, J. A. (2005). "Southern infrared proper motion survey. I. Discovery of new high proper motion stars from first full hemisphere scan". Astronomy and Astrophysics. 435 (1): 363–372. arXiv:astro-ph/0412127. Bibcode:2005A&A...435..363D. doi:10.1051/0004-6361:20042002. S2CID 54503017.
  4. ^ Burgasser, Adam J.; Gillon, Michaël; Melis, Carl; Bowler, Brendan P.; Michelsen, Eric L.; Bardalez Gagliuffi, Daniella; Gelino, Christopher R.; Jehin, E.; Delrez, L.; Manfroid, J.; Blake, Cullen H. (2015). "WISE J072003.20-084651.2: an Old and Active M9.5 + T5 Spectral Binary 6 pc from the Sun". The Astronomical Journal. 149 (3): 104. arXiv:1410.4288. Bibcode:2015AJ....149..104B. doi:10.1088/0004-6256/149/3/104. S2CID 45270145.
  5. ^ 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.

Notes[]


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