AFGL 2591

From Wikipedia, the free encyclopedia
Jump to: navigation, search
AFGL 2591

AFGL 2591
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 20h 29m 24.9s
Declination +40° 11' 21"'
Apparent magnitude (V) 44
U−B color index ?
B−V color index ?
Variable type None
Distance 3261.6 Ly
Mass M
Radius R
Luminosity 20.000 L
Surface gravity (log g) cgs
Temperature K
Metallicity ?
Rotation ?
Age 1 million years
Other designations
IRAS 20275+4001, RAFGL 19.
Database references

AFGL 2591 is a young, massive star in the constellation Cygnus. It is more than 3,000 light-years from Earth, at least 10 times the size of the Sun, and over 20,000 times as bright.[1] It is estimated to be about one million years old, about 1/5,000th of the Sun's age.[2]


AFGL 2591 is expelling a nebula of gas and dust, a common feature in the formation of stars that are similar in size to the Sun, but less common in larger stars. Over the past 10,000 years, this process has created a nebula that is over 500 times the diameter of the Solar System.

Infrared images from instruments mounted on the telescope Gemini North reveal four expanding rings of gas and dust, indicating that the expulsion occurred.


  1. ^ Gemini Spies Strong Stellar Gusts in Nearby Massive Star. 2004. Gemini Observatory. Retrieved June 18, 2008, from
  2. ^ Astronomy Picture of the Day. (n.d.) NASA. Retrieved June 18, 2008, from


Coordinates: Sky map 20h 29m 24.9s, +40° 11′ 21″