Right ascension 22 25 57 Distance 2000–3000 pc Constellation Cepheus | Declination 60° 11.8′ Designations EQ J222557+601158 | |
Notable features Originally misclassified as a supernova remnant People also search for HD 204521, Rho1 Cephei, 24 Cephei | ||
SSTGFLS J222557+601148 is a planetary nebula in the constellation Cepheus. Located between 2000 and 3000 parsecs distant from Earth, it was originally classified in 2006 as a supernova remnant. Thought to be the first supernova remnant first detected in the infrared wavelengths, the spectrum and properties of the object did not match up well with that of a typical supernova remnant, and it was reclassified as a planetary nebula in 2010. A candidate central star has been identified, with an apparent infrared magnitude of 22.4.
References
SSTGFLS J222557+601148 Wikipedia(Text) CC BY-SA