Berkeley 87 is an open cluster in a heavily obscured region of the Milky Way in Cygnus. The rare WO type Wolf–Rayet star WR 142 is a member of Berkeley 87.

This cluster contains HD 229059, which, as of August 2021, is the nearest known star to Earth with a bolometric luminosity greater than 1 million .

Star nameEffective temperatureAbsolute magnitudeBolometric magnitudeMass ()Spectral typeWR 142 (Berkeley 87–29)200000 K -3.13 -10.128.6WO2HD 229059 (Berkeley 87–3)26300 K -7.7 -10.369B1IaBerkeley 87-2535700 K -5.6 -9.139O8.5IIIBerkeley 87-1537800 K -5 -8.634B[e]Berkeley 87-429500 K -5 -7.923B0.2III

See also

List of most massive stars

References