Struve 1694

From Wikipedia, the free encyclopedia
Jump to: navigation, search


Σ 1694 A

Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 12h 49m 13.6s
Declination +83° 24′ 46.4″
Apparent magnitude (V) 5.28
Characteristics
Spectral type A1IIIsh
U−B color index -0.06
B−V color index -0.03
Astrometry
Radial velocity (Rv) 2.3 km/s
Proper motion (μ) RA: -0.029 mas/yr
Dec.: 0.020 mas/yr
Parallax (π) 10.63 ± 1.74 mas
Distance approx. 310 ly
(approx. 90 pc)
Absolute magnitude (MV) +0.54
Details
Rotation 275 Km/s
Orbit
Orbit
Companion CCDM 12492+8325 B
Other designations
HR 4893, HD 112028, BD+84°290, HIP 62572, SAO 2102, Σ 1694 A, STF 1694 A, Struve 1694 A, GC 17443, ADS 8682 A, CCDM 12492+8325 A.
Database references
SIMBAD data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)
Database references
SIMBAD data


Σ 1694 B

Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 12h 49m 06.6s
Declination +83° 25′ 04.2″
Apparent magnitude (V) 5.85
Characteristics
Spectral type A0V + A2V
U−B color index -0.12
B−V color index -0.06
Astrometry
Radial velocity (Rv) 1 km/s
Proper motion (μ) RA: -0.026 mas/yr
Dec.: 0.022 mas/yr
Parallax (π) 14.68 ± 6.92 mas
Distance approx. 200 ly
(approx. 70 pc)
Details
Rotation 17 Km/s
Orbit
Orbit
Companion CCDM 12492+8325 A
Other designations
HR 4892, HD 112014, BD+84°289, HIP 62561, SAO 2101, Σ 1694 B, STF 1694 B, Struve 1694 B, GC 17440, ADS 8682 B, CCDM 12492+8325 B.
Database references
SIMBAD data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)
Database references
SIMBAD data

Struve 1694 (Σ 1694, Struve 1694) is a star in the constellation Camelopardalis.[1]

Σ 1694 is a double star, with components of magnitudes 5.3m and 5.9m. Primary, Σ 1694 A is a white A-type subgiant with an apparent magnitude of 5.28m. It is approximately 300 light years from Earth. Secondary, Σ 1694 B is a spectroscopic binary both A-type main sequence star. Norton's Star Atlas describes the pair as yellowish and bluish.[1]

Σ 1694 was also known as 32H. Cam (Hevelius' 32nd of Camelopardalis), not Flamsteed's "32 Cam". Fl. 32 Cam is identical with 30 Aur. In British Association Catalogue, the star pair are belonging to the constellation Ursa Minor.

Chinese name[edit]

In Chinese, 北極 (Běi Jí), meaning North Pole, refers to an asterism consisting of Σ 1694, γ Ursae Minoris, β Ursae Minoris, 5 Ursae Minoris and 4 Ursae Minoris.[2] Consequently, Σ 1694 itself is known as 北極五 (Běi Jí wǔ, English: the Fifth Star of North Pole.),[3] representing 天樞 (Tiānshū), meaning Celestial Pivot.[4]


Notes[edit]

  1. ^ a b Norton, Arthur P. (1973). Norton's Star Atlas. p. 118. ISBN 0-85248-900-5. 
  2. ^ (Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
  3. ^ (Chinese) http://zh.wikipedia.org/wiki/%E5%A4%A9%E6%A8%9E_%28%E5%8C%97%E6%A5%B5%29
  4. ^ (Chinese) 香港太空館 - 研究資源 - 亮星中英對照表, Hong Kong Space Museum. Accessed on line November 23, 2010.