WR 137

WR 137 is a variable Wolf-Rayet star located around 6,000 light years away from Earth in the constellation of Cygnus.

[10][11] WR 137 is a binary system, with an O9 main sequence or giant companion.

[13] Its properties are uncertain because of the presence of the hot luminous companion.

A pseudo-fit of the combined spectrum yielded a temperature of 56,000 K, a luminosity of 537,000 L☉, and a radius of 10 R☉.

[6] Evolutionary modelling of the WR 137 pair suggest an initial mass for the primary of 60 M☉ and for the secondary of 30 M☉, with an age of 4.1 million years.

Spectrum of WR 137 showing the prominent emission lines of ionised Carbon and Helium
A blue band light curve for V1679 Cygni, plotted from data published by Panov et al. (2000) [ 12 ]