NGC 752 (also known as Caldwell 28) is an open cluster of stars 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.
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.Frommert, Kronberg, SEDS: NGC 752
Components The most up-to-date research lists 302 stars as members of NGC 752. Since the age of the cluster is , 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 01h 56m 08.9572s +37° 39' 52.7528" 10.41 F5.3V 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 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 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 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 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
External links
SEDS – NGC 752 perseus.gr – NGC 752 in a hires LRGB CCD image