Editing 3C 273 (section)

===Host galaxy===
3C 273 lies at the center of a giant [[elliptical galaxy]] with an [[apparent magnitude]] of 16 and an apparent size of 29 [[arcseconds]]. The [[Galaxy morphological classification|morphological classification]] of the host galaxy is E4,<ref name="Bahcall97">{{cite journal | author=Bahcall, John N. | author2=Kirhakos, Sofia | author3=Saxe, David H. | author4=Schneider, Donald P. | title=Hubble Space Telescope Images of a Sample of 20 Nearby Luminous Quasars | journal=The Astrophysical Journal | date=1997 | volume=479 | issue=2 | pages=642–658 |arxiv=astro-ph/9611163 | bibcode=1997ApJ...479..642B | doi=10.1086/303926| s2cid=15318893 }}</ref> indicating a moderately flattened elliptical shape. The galaxy has an estimated mass of {{val|2|e=11|ul=solar mass|p=~&nbsp;}}.<ref>{{cite journal | title=Kinematics of the Broad-line Region of 3C 273 from a 10 yr Reverberation Mapping Campaign | last1=Zhang | first1=Zhi-Xiang | last2=Du | first2=Pu | last3=Smith | first3=Paul S. | last4=Zhao | first4=Yulin | last5=Hu | first5=Chen | last6=Xiao | first6=Ming | last7=Li | first7=Yan-Rong | last8=Huang | first8=Ying-Ke | last9=Wang | first9=Kai | last10=Bai | first10=Jin-Ming | last11=Ho | first11=Luis C. | last12=Wang | first12=Jian-Min | journal=The Astrophysical Journal | volume=876 | issue=1 | id=49 | date=May 2019 | page=49 | doi=10.3847/1538-4357/ab1099 | arxiv=1811.03812 | bibcode=2019ApJ...876...49Z | s2cid=119403004 | doi-access=free }}</ref>