Caldwell 28
NGC 752 (also known as Caldwell 28) is an open cluster in the constellation Andromeda. The cluster was discovered by Caroline Herschel in 1783 and cataloged by her brother William Herschel in 1786, although an object that may have been NGC 752 was described by Giovanni Batista Hodierna before 1654.
NGC 752
The large cluster lies 1,400 light-years away from the Earth and is easily seen through binoculars, although it may approach naked eye visibility under good observing conditions. A telescope reveals about 60 stars no brighter than 9th magnitude within NGC 752.
Components
The most up-to-date research lists 302 stars as members of NGC 752. Since the age of the cluster is 1.34±0.06 Gyr, they are mainly low mass stars on the main sequence or red giants, with a main sequence turnoff at about F0. A blue straggler star is also present, along with some spectroscopic binaries and variable stars. The detached eclipsing binary DS Andromedae is a member of this cluster.
Images
Notable stars
| Name | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references | Relevance |
|---|---|---|---|---|---|---|
| TYC 2816-327-1 | 01 56 08.9572 | +37° 39' 52.7528" | 10.41 | F5.3V | Simbad | Gamma Doradus variable |
| DS Andromedae | 01 57 46.0561 | +38° 04' 28.43112" | 10.44 - 10.93 (variable) | F3IV-V + G0V (double) | Simbad | Beta Lyrae variable |
| BD+37 416 | 01 56 10.3002 | +37° 45' 00.0301" | 10.00 | F2III | Simbad | Spectroscopic binary |
| BD+37 416B | 01 56 11.1020 | +37° 45' 11.3889" | 11.19 | F0 | Simbad | Candidate companion of BD+37 416 |
| TYC 2816-1390-1 | 01 56 12.8772 | +38° 01' 43.1869" | 10.88 | F3V | Simbad | Spectroscopic binary |
| TYC 2319-568-1 | 01 56 57.5899 | +37° 23' 20.6538" | 10.6 | F2V | Simbad | Spectroscopic binary |
| 2MASS J01571216+3756048 | 01 57 12.1584 | +37° 56' 04.7909" | 11.9 | G5.0V | Simbad | Spectroscopic binary |
| BD+36 364 | 01 57 25.9968 | +37° 43' 19.6966" | 10.4 | F2III | Simbad | Spectroscopic binary |
| QX Andromedae | 01 57 57.7818 | +37° 48' 22.4500" | 11.28 - 11.50 (variable) | F5 | Simbad | W Ursae Majoris variable |
| 2MASS J01575883+3741269 | 01 57 58.8386 | +37° 41' 26.9575" | 12.31 | F8 | Simbad | Spectroscopic binary |
| TYC 2816-691-1 | 01 58 16.8604 | +37° 38' 15.9955" | 11.21 | F5V | Simbad | Spectroscopic binary |
| V447 Andromedae | 01 58 53.9322 | +37° 34' 42.5263" | 13.39 | K3.0 | Simbad | RS Canum Venaticorum variable |
| BD+36 348 | 01 55 27.6831 | +37° 34' 04.6482" | 10.14 | F2V | Simbad | Spectroscopic binary |
| BD+37 410 | 01 55 29.2926 | +37° 50' 26.3171" | 9.94 | F4III | Simbad | Eclipsing binary |
| BD+37 418 | 01 56 18.8954 | +37° 58' 00.4602" | 8.97 | G9III | Simbad | Spectroscopic binary |
| HD 11812 | 01 56 49.7623 | +38° 01' 21.6883" | 9.13 | F3V | Simbad | In the HD catalogue |
| HD 11811 | 01 56 50.4330 | +38° 01' 58.1400" | 8.91 | G2V | Simbad | Spectroscopic binary |
| BD+37 431 | 01 57 36.2116 | +37° 45' 10.1549" | 9.85 | F2III | Simbad | Spectroscopic binary |
| BD+36 367 | 01 57 37.3494 | +37° 29' 27.6181" | 9.75 | A0III | Simbad | Blue straggler |
| BD+36 368 | 01 57 37.5965 | +37° 39' 37.9032" | 8.85 | K1III | Simbad | Spectroscopic binary |
| BD+37 439 | 01 57 59.3462 | +37° 54' 53.9679" | 9.85 | F2III | Simbad | Spectroscopic binary |
| BD+37 444 | 01 58 36.8870 | +37° 45' 10.7241" | 9.62 | F2V | Simbad | Spectroscopic binary |
| TYC 2816-771-1 | 01 58 40.0620 | +37° 38' 05.2030" | 12.43 | F2V | Simbad | Spectroscopic binary |
| 2MASS J01591990+3723230 | 01 59 19.8967 | +37° 23' 23.0364" | 12.893 | – | Simbad | Spectroscopic binary |
References
- ^ "NGC 752". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 February 2018.
- ^ Gaysin, Renat; Hojaev, Alisher (2022). Open cluster NGC752: Revision by GAIA EDR3 data. Cambridge Workshop on Cool Stars. p. 82. Bibcode:2022csss.confE..82G. doi:10.5281/zenodo.7481659.
- ^ Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8.
- ^ Seligman, Courtney. "New General Catalogue objects: NGC 750 - 759". cseligman.com. Retrieved 10 February 2018.
- ^ Frommert, Kronberg, SEDS: NGC 752
- ^ Agüeros, M. A.; Bowsher, E. C.; Bochanski, J. J.; Cargile, P. A.; Covey, K. R.; Douglas, S. T.; Kraus, A.; Kundert, A.; Law, N. M.; Ahmadi, A.; Arce, H. G. (July 2018). "A New Look at an Old Cluster: The Membership, Rotation, and Magnetic Activity of Low-mass Stars in the 1.3 Gyr Old Open Cluster NGC 752". The Astrophysical Journal. 862 (1): 33. arXiv:1804.02016. Bibcode:2018ApJ...862...33A. doi:10.3847/1538-4357/aac6ed. S2CID 119438236.
- ^ Belloni, T.; Verbunt, F. (January 1996). "Soft X-rays from the intermediate-age open cluster NGC 752". Astronomy and Astrophysics. 305: 806. Bibcode:1996A&A...305..806B.
- ^ Sandquist, Eric L.; Buckner, Andrew J.; Shetrone, Matthew D.; Barden, Samuel C.; Pilachowski, Catherine A.; Deliyannis, Constantine P.; Harmer, Dianne; Mathieu, Robert; Meibom, Søren; Frandsen, Søren; Orosz, Jerome A. (2023). "Evolved Eclipsing Binaries and the Age of the Open Cluster NGC 752". The Astronomical Journal. 165 (1): 6. arXiv:2210.11649. Bibcode:2023AJ....165....6S. doi:10.3847/1538-3881/ac9c59. S2CID 253080539.
External links
Wikimedia Commons has media related to NGC 752.
- SEDS – NGC 752
- perseus.gr – NGC 752 in a hires LRGB CCD image
- NGC 752 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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