Astronomy:NGC 752

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Short description: Open cluster in the constellation Andromeda
NGC 752
NGC 752.png
NGC 752
Observation data (J2000 epoch)
ConstellationAndromeda
Right ascension 01h 57m 41s[1]
Declination+37° 47.1′[1]
Distance1,470 ly[2] (450 pc)
Apparent dimensions (V)75′
Physical characteristics
Other designationsCaldwell 28, Cr 23
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.[3]

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.[4][5]

Components

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

NGC 752
NGC 752

Notable stars

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

  1. ↑ 1.0 1.1 "NGC 752". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+752. 
  2. ↑ 2.0 2.1 Gaysin, Renat; Hojaev, Alisher (2022). "Open cluster NGC752: Revision by GAIA EDR3 data". 82. doi:10.5281/zenodo.7481659. Bibcode: 2022csss.confE..82G. 
  3. ↑ Seligman, Courtney. "New General Catalogue objects: NGC 750 - 759". http://cseligman.com/text/atlas/ngc7a.htm#752. 
  4. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named nightsky
  5. ↑ Frommert, Kronberg, SEDS: NGC 752
  6. ↑ 6.0 6.1 6.2 6.3 Agüeros, M. A.; Bowsher, E. C.; Bochanski, J. J.; Cargile, P. A.; Covey, K. R.; Douglas, S. T.; Kraus, A.; Kundert, A. et al. (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. doi:10.3847/1538-4357/aac6ed. Bibcode: 2018ApJ...862...33A. 
  7. ↑ 7.0 7.1 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. ↑ 8.0 8.1 Sandquist, Eric L.; Buckner, Andrew J.; Shetrone, Matthew D.; Barden, Samuel C.; Pilachowski, Catherine A.; Deliyannis, Constantine P.; Harmer, Dianne; Mathieu, Robert et al. (2023). "Evolved Eclipsing Binaries and the Age of the Open Cluster NGC 752". The Astronomical Journal 165 (1): 6. doi:10.3847/1538-3881/ac9c59. Bibcode: 2023AJ....165....6S. 

External links


Coordinates: Sky map 01h 57m 55s, +37° 51′ 57″



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