Merope is close to Alcyone (map bottom).
Epoch J2000 Equinox J2000
|Right ascension||03h 46m 19.5739s|
|Declination||23° 56′ 54.090″|
|Apparent magnitude (V)||4.113|
|U−B color index||-0.41|
|B−V color index||-0.06|
|Variable type||Beta Cephei|
|Radial velocity (Rv)||6.2 km/s|
|Proper motion (μ)||RA: 21.17 mas/yr
Dec.: -42.67 mas/yr
|Parallax (π)||9.08 ± 1.04 mas|
|Distance||approx. 360 ly
(approx. 110 pc)
|Absolute magnitude (MV)||−1.07|
|Surface gravity (log g)||4.0 cgs|
|Temperature||13,360 ± 340 K|
Merope is a blue-white B-type subgiant with a mean apparent magnitude of +4.14. Richard Hinckley Allen described the star as lucid white and violet. It has a luminosity of 630 times that of the Sun and a surface temperature of 14,000 kelvins. Merope's mass is roughly 4.5 solar masses and has a radius more than 4 times as great as the Sun's. It is classified as a Beta Cephei type variable star and its brightness varies by 0.01 magnitudes.
Surrounding Merope is the Merope Nebula. Part of the nebula that the Pleiades Cluster is currently passing through, it appears brightest around Merope and is listed in the Index Catalogue as number IC 349.
- SIMBAD query result: MEROPE -- Be Star, Centre de Données astronomiques de Strasbourg, retrieved 2010-06-12
- Crawford, D. L.; Barnes, J. V.; Golson, J. C. (1971), "Four-color, Hbeta, and UBV photometry for bright B-type stars in the northern hemisphere", The Astronomical Journal 76: 1058, Bibcode:1971AJ.....76.1058C, doi:10.1086/111220
- Perryman, M. A. C.; et al. (1997), "The HIPPARCOS Catalogue", Astronomy and Astrophysics Supplement Series, 323 34: 1–49, L49–L52, Bibcode:1997A&A...323L..49P
- Underhill, A. B.; et al. (November 1979), "Effective temperatures, angular diameters, distances and linear radii for 160 O and B stars", Monthly Notices of the Royal Astronomical Society 189: 601–605, Bibcode:1979MNRAS.189..601U, doi:10.1093/mnras/189.3.601
- Merope, Star Names and their Meanings, Richard Hinckley Allen, Dover Publications, 1963, p. 407.
|Wikimedia Commons has media related to Merope (star).|
- Jim Kaler's Stars, University of Illinois:Merope (23 Tauri)
- NGC 1435 - Merope Nebula LRGB image with 4 hours total exposure.