C.D.S. - SIMBAD4 rel 1.8 - 2023.02.03CET12:26:26 IERS B1820+397 -------------- Object ICRF J182159.7+394559 --- QSO --- OID=@2922964 (@@55734,16) --- coobox=19802 Coordinates(ICRS,ep=J2000,eq=2000): 18 21 59.6993384832 +39 45 59.632440156 (Opt ) A [0.1350 0.1626 90] 2020yCat.1350....0G Coordinates(FK4,ep=B1950,eq=1950): 18 20 21.2523076868 +39 44 27.137858089 Coordinates(Gal,ep=J2000,eq=2000): 067.4552516802084 +22.2914868115936 hierarchy counts: #parents=0, #children=0, #siblings=0 Proper motions: 0.011 -0.014 [0.167 0.215 90] A 2020yCat.1350....0G Parallax: 0.0701 [0.1666] A 2020yCat.1350....0G Radial Velocity: ~ [~ ~ ] ~ ~ Redshift: ~ [~ ~ ] ~ ~ cz: ~ [~ ~ ] ~ ~ Flux G : 19.114254 [0.004817] C 2020yCat.1350....0G Spectral type: ~ ~ ~ Morphological type: ~ ~ ~ Angular size: ~ ~ ~ (~) ~ ~ Identifiers (19): IERS B1820+397 Gaia DR3 2109497617205525632 B2.3 1820+39 B3 1820+397 BWE 1820+3944 GB6 B1820+3944 IVS B1820+397 JVAS B1820+397 JVAS J1821+397 MITG J182201+3945 NVSS J182159+394559 S4 1820+39 Gaia DR1 2109497617205525632 VCS1 J1821+3945 87GB 182021.6+394414 WN B1820.3+3944 CLASS J182159.6983+394559.655 Gaia DR2 2109497617205525632 ICRF J182159.7+394559 Bibcodes 1850-2023 () (16): 2020A&A...644A.159C 2019A&A...630A.101K 2019ApJS..242....5X 2017ApJ...835L..30M 2016A&A...595A...5M 2016AJ....151..154G 2015AJ....150...58F 2014ApJS..212...15F 2014ApJS..213....3M 2010A&A...511A..53V 2009A&A...500.1327R 2009A&A...505..385A 2002ApJS..141...13B 1999A&AS..135..273M 1992MNRAS.254..655P 1978AJ.....83..451P Measures (PLX:2 PM:2 ): PLX:2PM:2 Notes (1) : (S) 03-Nov-2015 - bc ref:~ obj:GB6 B1820+3944 See also \vizier{VIII/85A/spectra}{Seq= 76143 }{Specfind radio flux densities}. ================================================================================