IC 2581

Number of stars per data source

	Reference   21 :    1 star
	Reference  100 :    1 star

References

 21

Mendoza E.E.

(1967) Tonantzintla Tacubaya 4, 106

UBVRI Photometry of Southern Bright Stars

1967BOTT....4..106M

 100

Fernie J.D.

(1983) Astrophys. J. Suppl. 52, 7

New UBVRI Photometry for 900 Supergiants

1983ApJS...52....7F