B1950.0
因为恒星的赤经和赤纬会因岁差的原因而改变,天文学家经常指定某一特定的纪元作为参考点。B1950.0标准已经被继任标准J2000.0纪元所取代,J2000.0是现在使用的纪元标准。
前缀"B"代表这是一个贝塞耳纪元,而非儒略纪元。
参考
- Aoki, S.; Soma, M.; Kinoshita, H.; Inoue, K. . Astronomy and Astrophysics. 1983-12-01, 128 [2023-01-18]. Bibcode:1983A&A...128..263A. ISSN 0004-6361. (原始内容存档于2022-10-03).
- Standish, E. M., Jr. . Astronomy and Astrophysics. 1982-11-01, 115 [2023-01-18]. Bibcode:1982A&A...115...20S. ISSN 0004-6361. (原始内容存档于2022-11-13).
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