“NGC 752”的意思、由来-开放百科全书

词条

NGC 752

释义

Components
Notable stars
References
External links

{{Infobox cluster
| image =File:NGC_752.png
| caption = NGC 752
| credit =
| name = NGC 752
| constellation = Andromeda
| type =
| epoch = J2000
| ra = {{RA|01|57|41}}^[1]
| dec = {{DEC|+37|47.1}}^[1]
| dist_ly = 1,300 ly^[3]
| dist_pc = 400 pc
| appmag_v = 5.7^[2]
| size_v = 75′
| radius_ly =
| absmag_v =
| constellation name = Andromeda
| notes =
| names = 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.^[3]

The large cluster lies 1,300 light-years away from the Earth^[3] 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.^[2]^[4]

Components

The most up-to-date research lists 258 stars as members of this cluster. Since the age of the cluster is {{val|1.34|0.06}} Gyr, they are low mass stars in the main sequence or red giant phase. A blue straggler star is also present, along some spectroscopic binaries and variable stars.^[10]

Notable stars

Name	Right ascension	Declination	Apparent magnitude (V)	Spectral type	Database references	Relevance
TYC 2816-327-1	01^h 56^m 08.9572^s	+37° 39' 52.7528	10.41	F5.3V	Simbad	Gamma Doradus variable
DS Andromedae	01^h 57^m 46.0561^s	+38° 04' 28.43112	10.44 - 10.93 (variable)	F3IV-V + G0V (double)	Simbad	Beta Lyrae variable
BD+37 416	01^h 56^m 10.3002^s	+37° 45' 00.0301	10.00	F2III	Simbad	Spectroscopic binary
BD+37 416B	01^h 56^m 11.1020^s	+37° 45' 11.3889	11.19	F0	Simbad	Candidate companion of BD+37 416
TYC 2816-1390-1	01^h 56^m 12.8772^s	+38° 01' 43.1869	10.88	F3V	Simbad	Spectroscopic binary
TYC 2319-568-1	01^h 56^m 57.5899^s	+37° 23' 20.6538	10.6	F2V	Simbad	Spectroscopic binary
2MASS J01571216+3756048	01^h 57^m 12.1584^s	+37° 56' 04.7909	11.9	G5.0V	Simbad	Spectroscopic binary
BD+36 364	01^h 57^m 25.9968^s	+37° 43' 19.6966	10.4	F2III	Simbad	Spectroscopic binary
QX Andromedae	01^h 57^m 57.7818^s	+37° 48' 22.4500	11.28 - 11.50 (variable)	F5	Simbad	W Ursae Majoris variable
2MASS J01575883+3741269	01^h 57^m 58.8386^s	+37° 41' 26.9575	12.31	F8	Simbad	Spectroscopic binary
TYC 2816-691-1	01^h 58^m 16.8604^s	+37° 38' 15.9955	11.21	F5V	Simbad	Spectroscopic binary
V447 Andromedae	01^h 58^m 53.9322^s	+37° 34' 42.5263	13.39	K3.0	Simbad	RS Canum Venaticorum variable
BD+36 348	01^h 55^m 27.6831^s	+37° 34' 04.6482	10.14	F2V	Simbad	Spectroscopic binary
BD+37 410	01^h 55^m 29.2926^s	+37° 50' 26.3171	9.94	F4III	Simbad	Spectroscopic binary
BD+37 418	01^h 56^m 18.8954^s	+37° 58' 00.4602	8.97	G9III	Simbad	Spectroscopic binary
HD 11812	01^h 56^m 49.7623^s	+38° 01' 21.6883	9.13	F3V	Simbad	In the HD catalogue
HD 11811	01^h 56^m 50.4330^s	+38° 01' 58.1400	8.91	G2V	Simbad	Spectroscopic binary
BD+37 431	01^h 57^m 36.2116^s	+37° 45' 10.1549	9.85	F2III	Simbad	Spectroscopic binary
BD+36 367	01^h 57^m 37.3494^s	+37° 29' 27.6181	9.75	A0III	Simbad	Blue straggler^[10]
BD+36 368	01^h 57^m 37.5965^s	+37° 39' 37.9032	8.85	K1III	Simbad	Spectroscopic binary
BD+37 439	01^h 57^m 59.3462^s	+37° 54' 53.9679	9.85	F2III	Simbad	Spectroscopic binary
BD+37 444	01^h 58^m 36.8870^s	+37° 45' 10.7241	9.62	F2V	Simbad	Spectroscopic binary
TYC 2816-771-1	01^h 58^m 40.0620^s	+37° 38' 05.2030	12.43	F2V	Simbad	Spectroscopic binary
2MASS J01591990+3723230	01^h 59^m 19.8967^s	+37° 23' 23.0364	12.893	–	Simbad	Spectroscopic binary

References

1. ^¹{{cite simbad|title=NGC 752|access-date=10 February 2018}}
2. ^¹{{cite book | last = Dunlop | first = Storm | authorlink = Storm Dunlop | title = Atlas of the Night Sky | publisher = Collins | year = 2005 | doi = | isbn = 978-0-00-717223-8}}
3. ^¹²{{cite web|url=http://cseligman.com/text/atlas/ngc7a.htm#752|title=New General Catalogue objects: NGC 750 - 759|author=Seligman, Courtney|website=cseligman.com|accessdate=10 February 2018}}
4. ^Frommert, Kronberg, SEDS: NGC 752
5. ^¹²{{cite journal |title=Soft X-rays from the intermediate-age open cluster NGC 752 |journal=Astronomy and Astrophysics | last1=Belloni |first1=T. | last2=Verbunt |first2=F. |volume=305 |pages=806 |date=January 1996 |bibcode=1996A&A...305..806B}}

^[5]
}}

External links

SEDS – NGC 752
perseus.gr – NGC 752 in a hires LRGB CCD image
{{WikiSky}}

4 : Open clusters|Andromeda (constellation)|NGC objects|Caldwell objects

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