HD 72945 (original) (raw)
- HD 72945 and HD 72946 form a co-moving star system in the northern constellation of Cancer. HD 72945 is a binary star that is dimly visible to the naked eye as a point of light with an apparent visual magnitude of 5.91. At an angular separation of 10.10″ (as of 2020) is the fainter companion star HD 72946 at magnitude 7.25. It is being orbited by a brown dwarf. The system as a whole is located at a distance of approximately 84 light years from the Sun based on parallax measurements. The discovery of this double star was announced by F. G. W. Struve in 1782, and later given the discovery code STF 1245. Their common proper motion was confirmed by A. van Maanen in 1916, and this suggested they are physically associated. The projected separation of the two systems is 258.9 AU. Based on astrometric measurements from the Gaia spacecraft, the semimajor axis of this system is 200+52−41 AU. Assuming they are gravitationally bound, they would have an orbital period of around 2,500 years. There is an additional candidate stellar companion at an angular separation of ~130″, which would make this a four star system. (This object has the 2MASS designation J08354678+0635294.) Three additional faint companions detected by Struve are most likely background stars. (en)
- HD 72945 è una stella binaria di magnitudine 6 situata nella costellazione del Cancro. Dista 87 anni luce dal sistema solare. (it)
- HIP 42172 — звезда в созвездии Рака. Находится на расстоянии 81,95 световых лет (25,1 парсек) от Земли. (ru)
- HD 72945，又名BD+07 1997，SAO 116929、HR 3395，是一颗恒星，视星等为5.99，位于銀經219.12，銀緯26.2，其B1900.0坐标为赤經8h 30m 32s，赤緯+6° 26.2′ 8″。 (zh)
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- F8 V (en)
- G5V (en)
- HD 72945 (en)
- HD 72946 (en)
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- B (en)
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- HD 72945 A (en)
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- −137.148 (en)
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- HD+72946 (en)
- HD 72945 (en)
- HD 72946 (en)
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- Main sequence (en)
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- dbc:G-type_main-sequence_stars
- dbc:Gliese_and_GJ_objects
- dbc:Henry_Draper_Catalogue_objects
- dbc:Hipparcos_objects
- dbc:Spectroscopic_binaries
- HD 72945 è una stella binaria di magnitudine 6 situata nella costellazione del Cancro. Dista 87 anni luce dal sistema solare. (it)
- HIP 42172 — звезда в созвездии Рака. Находится на расстоянии 81,95 световых лет (25,1 парсек) от Земли. (ru)
- HD 72945，又名BD+07 1997，SAO 116929、HR 3395，是一颗恒星，视星等为5.99，位于銀經219.12，銀緯26.2，其B1900.0坐标为赤經8h 30m 32s，赤緯+6° 26.2′ 8″。 (zh)
- HD 72945 and HD 72946 form a co-moving star system in the northern constellation of Cancer. HD 72945 is a binary star that is dimly visible to the naked eye as a point of light with an apparent visual magnitude of 5.91. At an angular separation of 10.10″ (as of 2020) is the fainter companion star HD 72946 at magnitude 7.25. It is being orbited by a brown dwarf. The system as a whole is located at a distance of approximately 84 light years from the Sun based on parallax measurements. (en)
- HD 72945 (en)
- HD 72945 (it)
- HIP 42172 (ru)
- HD 72945 (zh)
- wikidata:HD 72945
- dbpedia-it:HD 72945
- dbpedia-ru:HD 72945
- dbpedia-zh:HD 72945
- https://global.dbpedia.org/id/3V7mA
- HD 72945 & HD 72946 (en)
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