Astronomy:SIPS 1259-4336
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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 |
| Distance | 25.20 ± 0.01 ly (7.726 ± 0.004 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
- ↑ 1.0 1.1 Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L. et al. (2018), "The Solar Neighborhood XLIV: RECONS Discoveries within 10 parsecs", The Astronomical Journal 155 (6): 265, doi:10.3847/1538-3881/aac262, Bibcode: 2018AJ....155..265H
- ↑ 2.0 2.1 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 3.0 3.1 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. doi:10.1051/0004-6361:20042002. Bibcode: 2005A&A...435..363D.
- ↑ Burgasser, Adam J.; Gillon, Michaël; Melis, Carl; Bowler, Brendan P.; Michelsen, Eric L.; Bardalez Gagliuffi, Daniella; Gelino, Christopher R.; Jehin, E. et al. (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. doi:10.1088/0004-6256/149/3/104. Bibcode: 2015AJ....149..104B.
- ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
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