NGC 2440 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 2440" in English language version.

refsWebsite

Global rank English rank

1,342^nd place

1,819^th place

75^th place

83^rd place

18^th place

17^th place

low place

low place

harvard.edu

ui.adsabs.harvard.edu

(James & Marion 2006) James, Renée; Marion, Howie (April 2006), "X-treme Stars of the cosmos", Astronomy, 34 (4): 34–39, Bibcode:2006Ast....34d..34J

nasa.gov

apod.nasa.gov

(Nemiroff & Bonnell 2007) Nemiroff, R.; Bonnell, J., eds. (February 15, 2007). "Planetary Nebula NGC 2440". Astronomy Picture of the Day. NASA.

skyhound.com

observing.skyhound.com

"Observing at Skyhound: NGC 2440".

u-strasbg.fr

simbad.u-strasbg.fr

(SIMBAD 2007) SIMBAD (January 9, 2007), Results for NGC 2440, SIMBAD, Centre de Données Astronomiques de Strasbourg