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NGC 752

Coordinates: Sky map 01h 57m 55s, 37° 51′ 57″
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(Redirected from Caldwell 28)
NGC 752
NGC 752
Observation data (J2000 epoch)
Right ascension01h 57m 41s[1]
Declination 37° 47.1′[1]
Distance1,470 ly[2] (450 pc)
Apparent magnitude (V)5.7[3]
Apparent dimensions (V)75′
Physical characteristics
Other designationsCaldwell 28, Cr 23
Associations
ConstellationAndromeda
See also: Open cluster, List of open clusters
Map showing the location of NGC 752

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.[4]

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.[3][5]

Components

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The most up-to-date research lists 302 stars as members of NGC 752.[2] 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.[6][7] The detached eclipsing binary DS Andromedae is a member of this cluster.[8]

Images

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NGC 752
NGC 752

Notable stars

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Name Right ascension Declination Apparent magnitude (V) Spectral type Database references Relevance
TYC 2816-327-1 01h 56m 08.9572s 37° 39' 52.7528" 10.41 F5.3V[6] Simbad Gamma Doradus variable
DS Andromedae 01h 57m 46.0561s 38° 04' 28.43112" 10.44 - 10.93 (variable) F3IV-V G0V (double) Simbad Beta Lyrae variable
BD 37 416 01h 56m 10.3002s 37° 45' 00.0301" 10.00 F2III Simbad Spectroscopic binary
BD 37 416B 01h 56m 11.1020s 37° 45' 11.3889" 11.19 F0 Simbad Candidate companion of BD 37 416
TYC 2816-1390-1 01h 56m 12.8772s 38° 01' 43.1869" 10.88 F3V Simbad Spectroscopic binary
TYC 2319-568-1 01h 56m 57.5899s 37° 23' 20.6538" 10.6 F2V Simbad Spectroscopic binary
2MASS J01571216 3756048 01h 57m 12.1584s 37° 56' 04.7909" 11.9 G5.0V[6] Simbad Spectroscopic binary
BD 36 364 01h 57m 25.9968s 37° 43' 19.6966" 10.4 F2III Simbad Spectroscopic binary
QX Andromedae 01h 57m 57.7818s 37° 48' 22.4500" 11.28 - 11.50 (variable) F5 Simbad W Ursae Majoris variable
2MASS J01575883 3741269 01h 57m 58.8386s 37° 41' 26.9575" 12.31 F8 Simbad Spectroscopic binary
TYC 2816-691-1 01h 58m 16.8604s 37° 38' 15.9955" 11.21 F5V Simbad Spectroscopic binary
V447 Andromedae 01h 58m 53.9322s 37° 34' 42.5263" 13.39 K3.0[6] Simbad RS Canum Venaticorum variable
BD 36 348 01h 55m 27.6831s 37° 34' 04.6482" 10.14 F2V Simbad Spectroscopic binary
BD 37 410 01h 55m 29.2926s 37° 50' 26.3171" 9.94 F4III Simbad Eclipsing binary[8]
BD 37 418 01h 56m 18.8954s 37° 58' 00.4602" 8.97 G9III Simbad Spectroscopic binary
HD 11812 01h 56m 49.7623s 38° 01' 21.6883" 9.13 F3V Simbad In the HD catalogue
HD 11811 01h 56m 50.4330s 38° 01' 58.1400" 8.91 G2V Simbad Spectroscopic binary
BD 37 431 01h 57m 36.2116s 37° 45' 10.1549" 9.85 F2III Simbad Spectroscopic binary
BD 36 367 01h 57m 37.3494s 37° 29' 27.6181" 9.75 A0III Simbad Blue straggler[7]
BD 36 368 01h 57m 37.5965s 37° 39' 37.9032" 8.85 K1III Simbad Spectroscopic binary
BD 37 439 01h 57m 59.3462s 37° 54' 53.9679" 9.85 F2III Simbad Spectroscopic binary
BD 37 444 01h 58m 36.8870s 37° 45' 10.7241" 9.62 F2V Simbad Spectroscopic binary
TYC 2816-771-1 01h 58m 40.0620s 37° 38' 05.2030" 12.43 F2V Simbad Spectroscopic binary
2MASS J01591990 3723230 01h 59m 19.8967s 37° 23' 23.0364" 12.893 – Simbad Spectroscopic binary

References

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  1. ^ a b "NGC 752". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 February 2018.
  2. ^ a b 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.
  3. ^ a b Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8.
  4. ^ Seligman, Courtney. "New General Catalogue objects: NGC 750 - 759". cseligman.com. Retrieved 10 February 2018.
  5. ^ Frommert, Kronberg, SEDS: NGC 752
  6. ^ a b c d 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.
  7. ^ a b 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.
  8. ^ a b 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.
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