1. The Center of NGC 6251 is Glowing
... Astronomy Picture of the Day . The Center of NGC 6251 is Glowing . << Yesterday . 12.09.1997 . Tomorrow >> . ... Credit: P. Crane J. Vernet ( ESO ), FOC , WFPC2 ESA , NASA Explanation: Something is lighting up the center of galaxy NGC 6251. ...
3. STScI Preprint #1277
... The black hole masses inferred for M87, M84, NGC 6251, NGC 4261 and NGC 7052 span a range of a factor 10, with NGC 7052 falling on the low end. ...
6. http://hea-www.harvard.edu/XJET/references.html
... ADS ] . NGC 6251 . Mack, K.-H., Kerp, J., & Klein, U. 1997, A&A, 324 , 870. ... The X-ray Jet and Halo of NGC 6251'' . [ ADS ] . ... The XMM-Newton View of the X-ray Halo and Jet of NGC 6251'' . [ astro-ph | ADS ] . ...
7. http://www.wro.org/scodova/RNGC_by_Constellation-UMi.pdf
... 9mmT6 Aug 13 1982 12.5" 16mm PB,VL,R,FNUC,SHISB,FACE ON,SMALL FAINT NUC,DUST SUSP,FARMS,R=E PF,PS,DIF,STELL NUC,OVAL,SBM,NO *'S NGC 6251 H974-3 Galaxy E CF,S,BM,P OF 2 Jun 22 2003 12.5" 9mmT6 PF,MS,PATCH,FNUC,SHISB TOWARDS MIDDLE,SMBM,PAIR=6252,R=F NGC ...
8. J1632+8232
... 5-GHz total flux density . optical ID . redshift . NGC 6251 . 16 h 32 m 31.972 s * . + 82 32 16.40 " . 0.7 Jy . ...