KIC 9832227
|
Star KIC 9832227 |
|||||
|---|---|---|---|---|---|
| AladinLite | |||||
|
Observation dates equinox : J2000.0 , epoch : J2000.0 |
|||||
| Constellation | swan | ||||
| Right ascension | 19 h 29 m 15.95 s | ||||
| declination | + 46 ° 37 ′ 19.9 ″ | ||||
| Apparent brightness | 12.27-12.46 mag | ||||
| Typing | |||||
| Spectral class | G5 | ||||
| Variable star type | EW | ||||
| Astrometry | |||||
| Radial velocity | −40 km / s | ||||
| parallax | (1.68 ± 0.03) mas | ||||
| distance | 1,950 ly 600 pc |
||||
| Proper movement | |||||
| Rec. Share: | −9.8 mas / a | ||||
| Dec. portion: | −5.8 mas / a | ||||
| Physical Properties | |||||
| Dimensions | (1.40 / 0.32) M ☉ | ||||
| radius | (1.58 / 0.83) R ☉ | ||||
| Luminosity |
(2.61 / 0.79) L ☉ |
||||
| Effective temperature | (5800/5920) K. | ||||
|
Other names and catalog entries |
|||||
|
|||||
KIC 9832227 is a physical binary star system in the constellation Swan , which is located approximately 1940 (± 30) light years from Earth. It is a closely eclipsed variable whose two components rotate around each other in just under 11 hours. The period of rotation decreases continuously.
future
The merger of the two stars in a so-called merger burst was initially predicted for 2022. The event should be visible from Earth for months as a Luminous Red Nova (LRN). However, new calculations including older measurements from 2003 refuted the prediction. In addition, an error in the documentation of a measuring point from 1999 was discovered. When the event will occur is open again.
Web links
- ZDF-Mediathek: Ask the Lesch: Mega-Explosion in the Universe . Retrieved June 5, 2017.
- Adventure-Astronomie.de : 2022: Bright red star should light up in the swan . Retrieved January 9, 2017.
- Spektrum.de : Rote Nova in the neighborhood .
- Adventure-Astronomie.de : "Rote Nova" 2022 in the swan surprisingly canceled . Retrieved September 7, 2018.
Individual evidence
- ↑ a b c d e KIC 9832227. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on July 13, 2018 .
- ↑ a b The International Variable Star Index: ASAS J192916 + 4637.3 . Retrieved January 7, 2017.
- ↑ a b c d e Lawrence A. Molnar, Daniel M. Van Noord, Karen Kinemuchi, Jason P. Smolinski, Cara E. Alexander, Evan M. Cook, Byoungchan Jang, Henry A. Kobulnicky, Christopher J. Spedden, Steven D. Steenwyk: Prediction of a Red Nova Outburst in KIC 9832227 . In: The Astrophysical Journal . tape 840 , no. 1 . IOP Publishing, May 1, 2017, p. 1 , doi : 10.3847 / 1538-4357 / aa6ba7 , arxiv : 1704.05502 (English, iop.org ).
- ↑ a b Karen Kinemuchi: To Pulsate or to Eclipse? Status of KIC 9832227 Variable Star. October 1, 2013, arxiv : 1310.0544 .
- ↑ a b Lawrence A. Molnar, Daniel Van Noord, Karen Kinemuchi, Jason P. Smolinski, Cara E. Alexander, Henry A. Kobulnicky, Evan M. Cook, Byoungchan Jang, Steven D. Steenwyk: KIC 9832227: A red nova precursor . American Astronomical Society Meeting 229, 2017, pp. 417.04. bibcode : 2017AAS ... 22941704M .
- ↑ Stars and Space , March 2018 p. 6.