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天船四（英仙座ψ）
ψ Persei
觀測資料; 曆元 J2000
星座	英仙座
星官	胃宿天船
赤經	03h 36m 29.3789s
赤緯	+48° 11′ 33.481″
視星等（V）	4.310
特性
光谱分类	B5Ve
U−B 色指数	−0.56
B−V 色指数	−0.06
变星类型	仙后座γ型变星
天体测定
徑向速度 (Rv)	−1.1 km/s
自行 (μ)	赤经：+21.41 mas/yr ; 赤纬：−27.58 mas/yr
视差 (π)	4.66 ± 0.73 mas
距离	approx. 700 ly ; (approx. 210 pc)
詳細資料
自轉速度 (v sin i)	390 km/s
其他命名
	37 Persei, BD+47 857, HD 22192, HIP 16826, HR 1087, SAO 38980.

天船四，即英仙座ψ（ψ Persei），是一颗位于英仙座的Be星，距离地球约700光年。

Be星是一种壳层星，在其赤道周围有气体的星周盘环绕，天船四有明显的发射光谱，视星等也在变化。^[5] 天船四的自转非常快速，赤道的投影自转速度(v sin i)至少为390 km/s。^[7]

天船四可能是疏散星团英仙座α星团的成员，但它的自行速度明显高于英仙座α星团的其他恒星。^[8]

参考资料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 Perryman, M. A. C.; et al. The Hipparcos Catalogue. Astronomy and Astrophysics. 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P.
^ ^2.0 ^2.1 psi Per -- Be Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2011-02-24]. （原始内容存档于2020-11-05）.
^ Lesh, Janet Rountree. The Kinematics of the Gould Belt: an Expanding Group?. Astrophysical Journal Supplement. December 1968, 17: 371. Bibcode:1968ApJS...17..371L. doi:10.1086/190179.
^ ^4.0 ^4.1 Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. UBVRIJKL photometry of the bright stars. Communications of the Lunar and Planetary Laboratory. 1966, 4 (99). Bibcode:1966CoLPL...4...99J.
^ ^5.0 ^5.1 Percy, John R.; Ivans, Inese I.; Fried, Robert E.; Paparo, Margit. Short-term photometric variability of Psi Persei and Zeta Tauri. Publications of the Astronomical Society of the Pacific. February 1994, 106 (696): 131–133. Bibcode:1994PASP..106..131P. doi:10.1086/133356.
^ Evans, D. S. The Revision of the General Catalogue of Radial Velocities. Batten, Alan Henry; Heard, John Frederick (编). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union: 57–63. June 20–24, 1966. Bibcode:1967IAUS...30...57E. |year=与|date=不匹配 (帮助)
^ ^7.0 ^7.1 Bernacca, P. L.; Perinotto, M. A Catalogue of Stellar Rotational Velocities. Contributi Osservatorio Astronomico di Padova in Asiago. 1970, 239 (1). Bibcode:1970CoAsi.239....1B.
^ Morrell, Nidia; Abt, Helmut A. Spectroscopic binaries in the Alpha Persei cluster. Astrophysical Journal, Part 1. July 10, 1992, 393 (2): 666–673. Bibcode:1992ApJ...393..666M. doi:10.1086/171534.

[aaa323-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 Perryman, M. A. C.; et al. The Hipparcos Catalogue. Astronomy and Astrophysics. 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P.

[SIMBAD-2] 2.0 ^2.1 psi Per -- Be Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2011-02-24]. （原始内容存档于2020-11-05）.

[apjs17_371-3] Lesh, Janet Rountree. The Kinematics of the Gould Belt: an Expanding Group?. Astrophysical Journal Supplement. December 1968, 17: 371. Bibcode:1968ApJS...17..371L. doi:10.1086/190179.

[clpl4-4] 4.0 ^4.1 Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. UBVRIJKL photometry of the bright stars. Communications of the Lunar and Planetary Laboratory. 1966, 4 (99). Bibcode:1966CoLPL...4...99J.

[pasp106_696_131-5] 5.0 ^5.1 Percy, John R.; Ivans, Inese I.; Fried, Robert E.; Paparo, Margit. Short-term photometric variability of Psi Persei and Zeta Tauri. Publications of the Astronomical Society of the Pacific. February 1994, 106 (696): 131–133. Bibcode:1994PASP..106..131P. doi:10.1086/133356.

[rgcrv-6] Evans, D. S. The Revision of the General Catalogue of Radial Velocities. Batten, Alan Henry; Heard, John Frederick (编). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union: 57–63. June 20–24, 1966. Bibcode:1967IAUS...30...57E. |year=与|date=不匹配 (帮助)

[csrv-7] 7.0 ^7.1 Bernacca, P. L.; Perinotto, M. A Catalogue of Stellar Rotational Velocities. Contributi Osservatorio Astronomico di Padova in Asiago. 1970, 239 (1). Bibcode:1970CoAsi.239....1B.

[apj393_2_666-8] Morrell, Nidia; Abt, Helmut A. Spectroscopic binaries in the Alpha Persei cluster. Astrophysical Journal, Part 1. July 10, 1992, 393 (2): 666–673. Bibcode:1992ApJ...393..666M. doi:10.1086/171534.

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