Epoch J2000.0 Equinox J2000.0
|Right ascension||17h 41m 58.2s|
|Declination||+72° 09′ 11.0″|
|Apparent magnitude (V)||4.59/5.81|
|Age||?4.9 billion years|
HIP 86614, GJ 694.1, A GJ 9602 A, WDS J17419+7209 A, TYC 4436-01425-1, IRAS 17428+7210A PSI Dra A, 31 Dra A, HD 162003, HR 6636, BD+72 804, SAO 8890 2MASS J17415635+7208561
|Period (P)||≈13,700 yr|
|Semi-major axis (a)||661 AUs"|
HIP 86620, GJ 694.1 B, GJ 9602 B, WDS J17419+7209 B, TYC 4436-01424-1, PSI Dra B, 31 Dra B, HD 162004, HR 6637, BD+72 805, SAO 8891, 2MASS J17415811+7209251
Psi Draconis (ψ¹ Dra, ψ¹ Draconis) is a star in the constellation Draco. It also has the traditional name Dziban, from the Arabic Adh-Dhi'ban, meaning "The two wolves" or "The two jackals". The primary component of the binary system is suspected to host a substellar companion.
In Chinese astronomy, Dziban is called 女史, Pinyin: Nǚshǐ, meaning Female Protocol, because this star is marking itself and stand alone in Female Protocol asterism, Purple Forbidden enclosure (see : Chinese constellation). 女史 (Nǚshǐ) westernized into Niu She by R.H. Allen, with the meaning is "the Palace Governess", or "a Literary Woman" 
Okayama Planet Search team published a paper in late 2008 reporting investigations on radial velocity variations observed for a set of evolved stars, showing possible hints of a substellar companion orbiting Psi1 Draconis A, primary component of the binary system. Probably a brown dwarf, the unseen substellar companion would yield a minimum mass 50 times that of Jupiter and an orbital period of 8.77 years. The unseen companion is still putative, not yet confirmed.
(in order from star)
|b (unconfirmed)||≥50 MJ||≈4.7||3200||?||—||—|
- (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 10 日
- Star Name - R.H. Allen p.212
- Toyota et al. (2008). "Radial Velocity Search for Extrasolar Planets in Visual Binary Systems". Publications of the Astronomical Society of Japan 61 (1): 19–28. Bibcode:2009PASJ...61...19T. doi:10.1093/pasj/61.1.19.
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