TO Ursae Majoris
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Double star AN Ursae Majoris |
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| AladinLite | |||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Big Bear | ||||
| Right ascension | 11 h 04 m 25.66 s | ||||
| declination | + 45 ° 03 ′ 13.9 ″ | ||||
| Apparent brightness | 14.9 (14.5 to 19.3) mag | ||||
| Typing | |||||
| Variable star type | AM + E | ||||
| Astrometry | |||||
| parallax | (3.10 ± 0.14) mas | ||||
| distance | (1050 ± 50) ly (320) pc |
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| Proper movement | |||||
| Rec. Share: | (−44.99 ± 0.10) mas / a | ||||
| Dec. portion: | (−24.97 ± 0.14) mas / a | ||||
| Physical Properties | |||||
| Dimensions | (1 / 0.22 to 0.24) M ☉ | ||||
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Other names and catalog entries |
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AN Ursae Majoris is a binary star system in the constellation Great Bear . Together with AM Herculis he forms the prototype of the so-called AM Herculis stars , which belong to the cataclysmic variables . The system is about 1000 light years away .
Individual evidence
- ↑ a b c d AN UMa. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 15, 2018 .
- ↑ a b TO UMa. In: VSX. AAVSO, accessed September 15, 2018 .
- ↑ Kalomeni, B .: Short and long time-scale variability in magnetic cataclysmic variables: long-term monitoring of polars . In: MNRAS . 422, No. 2, 05/2012, pp. 1601-1608. bibcode : 2012MNRAS.422.1601K . doi : 10.1111 / j.1365-2966.2012.20736.x .
- ↑ W. Krzemiński, K. Serkowski: Extremely high circular polarization of AN Ursae Majoris . In: The Astrophysical Journal Letters . 216, Aug 1977, p. L45. bibcode : 1977ApJ ... 216L..45K . doi : 10.1086 / 182506 .