Object name: ARP151
Arp 151 is a rather odd object. It appears to be a compact galaxy with a long jet (40") that has a bright knot in the middle of it. Or maybe it is a chain of three galaxies as the Vorontso-Velyaminov Interacting Galaxy Catalog indicates saying it is VV144a, b, and c. But http://i273.photobucket.com/albums/jj229/Astronomerica/SDSS-48/NGC5820-SDSS.jpg gives the exact same coordinates for each entry! All point to the lower compact object. Arp put it in his class Galaxies (not classifiable as E or S): with jets. He said nothing about it, however. It appears in many catalogs as many different types of objects. NED says it is a Seyfert 1 galaxy. It's in the 2MASS survey as an infrared object. The Markarian catalog lists it as an ultraviolet excess galaxy. It is in the Second Byurakan Survey of Emission Line Objects as an emission line source. The SDSS lists it as a quasar. That one surprised me greatly. The Luyten Blue Star Catalogue lists it as a blue star! It is in several X-ray catalogs as an X-ray source and some catalogs actually consider it a galaxy. Talk about an identity crisis! A note at NED says this galaxy was the first Luyten blue "star" recognized to be a galaxy. I assume this refers to the blue knot in its center. NED gives its length as 29.4" while I measure it at 53", nearly twice as long. Why such a large difference?
Related Designation(s):1RXP J112536.6+542303, 1RXS J112536.7+542243, 1WGA J1125.6+5423, 2MASX J11253611+5422572, 2PBC J1125.4+5424, ARP 151, ARP151, CGPG 1122.7+5440, I Zw 026, LB 02012, LQAC 171+054 001, MCG +09-19-073, MRK 0040, NSA 159806, PGC 035129, RX J1125.6+5422, RX J1125.6+5422:[BEV98] 001, RX J1125.6+5422:[ZEH2003] 02 , SBS 1122+546B, SDSS J112536.16+542257.1, SDSS J112536.16+542257.2, SDSS J112536.16+542257.5, SDSS J112536.17+542257.1, SWIFT J1125.4+5421, VV 144, [GL2009] 37, [RC2] A1122+54, [SHV2006] 1208, [VCV2001] J112536.1+542256, [VCV2006] J112536.1+542256,