Open cluster NGC6530, and
the Lagoon Nebula, M8, in Sagittarius Comments
A map of the star field. Magnitudes are given without
a decimal point, e.g. 67 is to be interpreted as magnitude 6.7.
A three full magnitudes dimmer than the Orion Nebula, this can most charitably be desribed as an interesting challenge for the binocular observer. Not worth attempting except under optimal conditions. As is often the case with nebulae, it can be hard to tell that the bright core is anything other than a star.
60-degree field of view
Data for NGC6530 (Janes, Duke, and Lynga, 1987) RA 18 05 dec -24 21 total V magnitude 4.6 NGC number 6530 Trumpler class II 2 m n angular diameter 14' distance 1500 pc age (Myr) 10 integrated B-V .14 observed stars 113 earliest sp. class O5 brightest star 6.0 Data for M8 (Janes, Duke, and Lynga, 1987) total V magnitude 5.8
(c) Copyright 1998 Benjamin Crowell. All right reserved.
Photos from the Digitized Sky Survey, stdatu.stsci.edu/dss/dss_form.html
Sky maps created by Your Sky, www.fourmilab.com