C.D.S. - SIMBAD4 rel 1.8 - 2024.06.30CEST04:52:25 Abell 21 -------- Object ACO 21 --- ClG --- OID=@1502723 (@@110834,17) --- coobox=11546 Coordinates(ICRS,ep=J2000,eq=2000): 00 20 38.75 +28 41 40.5 (Opt ) D [~ ~ ] 2020ApJS..246....2A Coordinates(FK4,ep=B1950,eq=1950): 00 18 01.92 +28 25 01.9 Coordinates(Gal,ep=J2000,eq=2000): 114.81338 -33.69129 hierarchy counts: #parents=1, #children=87, #siblings=0 Proper motions: ~ ~ [~ ~ ] ~ ~ Parallax: ~ [~] ~ ~ Radial Velocity: 27024 [~] C 2016ApJ...819...63R Redshift: 0.0946 [~] C 2016ApJ...819...63R cz: 28360 [~] C 2016ApJ...819...63R Flux Spectral type: ~ ~ ~ Morphological type: ~ ~ ~ Angular size: ~ ~ ~ (~) ~ ~ Identifiers (22): [AWK2020] 26 PSZRX G114.82-33.73 [B2017] 60 [WHL2012] J002037.2+283934 1H 0018+280 2E 65 ACO 21 EXSS 0018.0+2823 RBS 46 ZwCl 0017+2822 [F81] 9 1RXS J002039.5+284027 2E 0017.9+2822 ClG 0017.9+2822 RX J0020.6+2840 RXC J0020.6+2840 BAX 005.1283+28.6274 MCXC J0020.6+2840 PSZ1 G114.78-33.72 2MAXI J0021+286 [RRB2014] RM J002037.2+283934.2 PSZ2 G114.79-33.71 Bibcodes 1850-2024 () (108): 2024A&A...682A..45L 2024A&A...682A.105P 2024ApJ...961..185L 2024ApJS..272....7B 2024MNRAS.528.5924O 2024RNAAS...8...45T 2023A&A...672A..42Z 2023A&A...674A.179B 2023A&A...679A..51I 2023MNRAS.525..898L 2022A&A...659A.126A 2022A&A...660A..78B 2022A&A...665A..71O 2022A&A...665A.117C 2022ApJ...930...83T 2021A&A...650A.104C 2021A&A...655A..27U 2021A&A...655A.115F 2021MNRAS.500..310D 2021MNRAS.502.3911S 2020A&A...636A..15M 2020A&A...637A..58L 2020ApJ...891..129S 2020ApJS..246....2A 2020MNRAS.497.4684H 2019A&A...626A...7T 2018A&A...609A..49B 2018ApJS..238...32K 2018MNRAS.478.1244S 2017AJ....153...37S 2017MNRAS.468.1917R 2017MNRAS.468.3322S 2016A&A...594A..27P 2016ApJ...819...63R 2016ApJS..224....1R 2015A&A...580A..95P 2015A&A...581A..14P 2015MNRAS.453.1201H 2014A&A...571A..29P 2014ApJ...785..104R 2014MNRAS.444L..63F 2013A&A...550A.134P 2013ApJS..207...36H 2012AJ....144..128A 2012ApJ...746..163S 2012MNRAS.425..204B 2012MNRAS.425..477N 2011A&A...534A.109P 2010RMxAA..46...61T 2009ApJS..184..138H 2009JBAA..119..353H 2009MNRAS.395....2P 2007ApJ...671.1471B 2006A&A...450....9F 2006ApJ...648..176L 2004A&A...424.1097S 2004ApJ...614..679L 2003A&A...406..535Z 2002AJ....124.1918M 2002ApJ...569..134M 2002ApJ...576..688B 2001AJ....122.2222E 2001ApJ...554L.129M 2000AJ....120..540G 2000AN....321....1S 2000ApJS..129..435B 1999AJ....117.1985Y 1999ApJ...511...65J 1999ApJ...524...22W 1999ApJ...525...47V 1999MNRAS.306..857C 1998A&A...338..813W 1998AJ....115.1737K 1998ApJ...501..571G 1998MNRAS.301..881E 1997MNRAS.292..419W 1996ApJ...458...27B 1996MNRAS.281..799E 1995AN....316..319B 1995ApJS...99..405C 1994AJ....108....1S 1992ApJ...384..404P 1991AJ....101..783M 1991AJ....101.1561P 1991ApJS...77..363S 1989AJ.....98..351M 1989AN....310....7B 1989ApJ...346...34T 1989ApJS...70....1A 1988A&A...206...27V 1988AJ.....96.1534S 1987ApJ...316...70E 1987ApJ...323....1T 1987ApJS...63..543S 1987ApJS...63..555S 1985AJ.....90.1413B 1985AJ.....90.1648H 1985MNRAS.216p..71S 1984ApJS...56..403K 1984ApJS...56..507W 1983ApJ...266..425J 1982A&A...107..338B 1982A&A...108L...7S 1982AJ.....87....7S 1981SvA....25..647F 1980ApJ...241..486H 1980ApJ...241..493H 1971ApJS...23..371S Measures (velocities:9 ): velocities:9 Notes (0) : ================================================================================