Berkeley 87

Number of stars per data source

	Reference  143 :    1 star
	Reference  173 :    1 star
	Reference  392 :    1 star
	Reference  742 :   39 stars
	Reference 1111 :    1 star
	Reference 1464 :    1 star

References

 143
Lee T.A.
(1970) Astrophys. J. 162, 217
Photometry of high-luminosity M-type stars
1970ApJ...162..217L
 173
Hiltner W.A.
(1956) Astrophys. J. Suppl. 2, 389
Photometric polarization and spectrographic observations of O and B Stars
1956ApJS....2..389H
 392
Crampton D., Georgelin Y.M., Georgelin Y.P.
(1978) Astron. Astrophys. 66, 1
First optical detection of W51 and observations of new HII regions and exciting stars
1978A&A....66....1C
 742
Turner D.G.
(1982) Publ. Astron. Soc. Pacific 94, 789
Berkeley 87. A heavily-obscured young open cluster associated with the ON2 star-formation complex and containing the W0 star Stephenson 3
1982PASP...94..789T
 1111
Sharpless S.
(1966) IAU Symp. 24, 345
Spectroscopic parallaxes of M-type supergiants
1966IAUS...24..345S
 1464
Coyne G.V., Wisniewski W., Corbally C.
(1975) Vatican Obs. Publ. 1, 197
A survey for Halpha emission objects in the Milky Way II. Cygnus
1975VatOP...1..197C