3 Vulpeculae
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vulpecula |
| Right ascension | 19h 22m 50.90s |
| Declination | +26° 15′ 45.0″ |
| Apparent magnitude (V) | 5.18 |
| Distance | 402.66241 ly (123.457 pc) |
| Spectral type | B6III |
3 Vulpeculae (abbreviated 3 Vul) is a star in the constellation Vulpecula. 3 Vulpeculae is its Flamsteed designation. It has been nicknamed "the Observer's Nightmare" (or its Latin free translation, "Spectatori Error Inextricabilis") by some astronomers[1][2] either because it is difficult to find in the sky (due to the fact it is a dim star in an equally dim constellation)[1] or to study (as its orbital period is one year, but its pulsation is 1 day).[2]
It has been identified as a slowly pulsating B-type star,[2] a type of variable star of which only about 40 are visible to the naked eye.
References
- 1 2 Kaler, Jim. "3 Vul". Retrieved 2016-08-09.
- 1 2 3 Dukes, Robert; Kubinec, William; Kubinec, Angela; Adelman, Saul (2003). "A Photometric and Spectroscopic Study of 3 Vulpeculae: An Observer's Nightmare". The Astronomical Journal. 126 (1): 370. doi:10.1086/375463. Retrieved 2016-08-09.
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