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- HR 857 je hvězda spektrálního typu K1, vzdálená od Země 33,7 ly. Jedná se o oranžového trpaslíka, který se nachází v souhvězdí Eridanu. Radiální rychlost hvězdy činí přibližně 17,8 km/s. (cs)
- HD 17925 is a variable star in the equatorial constellation of Eridanus. It has the Gould designation 32 G. Eridani and the variable star designation EP Eri. The star has a yellow-orange hue and is dimly visible to the naked eye in good seeing conditions with an apparent visual magnitude that varies from 6.03 down to 6.08. It is located nearby at a distance of 34 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +18 km/s. It is a likely member of the Local Association of nearby, co-moving stars. The spectrum shows a strong abundance of lithium, indicating that it is young star. This likely makes its point of origin the nearby . The stellar classification of HD 17925 is K1V, which indicates this is a K-type main-sequence star that is engaged in core hydrogen fusion. It is an active star that is classified as a RS Canum Venaticorum variable, showing a rotational modulation with a period of 6.9 days, and has been observed to flare. The star has an estimated age of 100 million years and is spinning with a projected rotational velocity of 4.8 km/s. The rotation period of 6.6 days days can be determined from its activity cycle. The star has 88% of the mass of the Sun and 85% of the Sun's radius. It is radiating 41% of the luminosity of the Sun from its photosphere at an effective temperature of 5,225 K. The presence of an unseen companion has been suggested based on variations in the widths of absorption lines in the star's photosphere. It displays low-amplitude radial velocity variation, which may indicate it is a spectroscopic binary. However, the binary hypothesis doesn't appear to be consistent with Hipparcos satellite data. An infrared excess has been detected around this star, most likely indicating the presence of a circumstellar disk at a radius of 17.9 AU. The temperature of this dust is 52 K. (en)
- HR 857은 뱀주인자리에 있는 별로 단독성이자 분광형 K1V의 오렌지색 왜성이다. 이 별은 지구에서 약 34광년 떨어진 곳에 있다. 적위는 -12도 46분 11초, 적경은 02시 52분 32.1초이다. 겉보기 등급은 6.04로, 기상 환경이 가장 좋을 경우 맨눈으로 볼 수 있는 가장 어두운 수준이다. (ko)
- HR 857 is een oranje dwerg met een spectraalklasse van K1.V. De ster bevindt zich 33,78 lichtjaar van de zon. (nl)
- HD 17925，又名BD-13 544，SAO 148647、HR 857，是一颗恒星，视星等为6.04，位于銀經192.06，銀緯-58.26，其B1900.0坐标为赤經2h 47m 42.9s，赤緯-13° -58.26′ 30″。 (zh)
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- HR 857 je hvězda spektrálního typu K1, vzdálená od Země 33,7 ly. Jedná se o oranžového trpaslíka, který se nachází v souhvězdí Eridanu. Radiální rychlost hvězdy činí přibližně 17,8 km/s. (cs)
- HR 857은 뱀주인자리에 있는 별로 단독성이자 분광형 K1V의 오렌지색 왜성이다. 이 별은 지구에서 약 34광년 떨어진 곳에 있다. 적위는 -12도 46분 11초, 적경은 02시 52분 32.1초이다. 겉보기 등급은 6.04로, 기상 환경이 가장 좋을 경우 맨눈으로 볼 수 있는 가장 어두운 수준이다. (ko)
- HR 857 is een oranje dwerg met een spectraalklasse van K1.V. De ster bevindt zich 33,78 lichtjaar van de zon. (nl)
- HD 17925，又名BD-13 544，SAO 148647、HR 857，是一颗恒星，视星等为6.04，位于銀經192.06，銀緯-58.26，其B1900.0坐标为赤經2h 47m 42.9s，赤緯-13° -58.26′ 30″。 (zh)
- HD 17925 is a variable star in the equatorial constellation of Eridanus. It has the Gould designation 32 G. Eridani and the variable star designation EP Eri. The star has a yellow-orange hue and is dimly visible to the naked eye in good seeing conditions with an apparent visual magnitude that varies from 6.03 down to 6.08. It is located nearby at a distance of 34 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +18 km/s. It is a likely member of the Local Association of nearby, co-moving stars. The spectrum shows a strong abundance of lithium, indicating that it is young star. This likely makes its point of origin the nearby . (en)
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- HR 857 (cs)
- HD 17925 (en)
- HR 857 (ko)
- HR 857 (nl)
- HD 17925 (zh)
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