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VizieR

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VII/110A/table3 Rich Clusters of Galaxies (Abell+ 1989)
Revised northern "Abell Catalog" (2712 rows)
  recno=907
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ColumnValue  Explain   (UCD)
_RAJ200009 58 21.1 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000-11 03 22 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195009 55 54.0 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950-10 49 00 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon249.3616 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+33.2672 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
907recno 907  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

ACO 907  (i) [1,2712] "Abell" number (meta.id;meta.main)
RAB195009 55.9 "h:m:s" (i) right ascension (B1950) (pos.eq.ra;meta.main)
DEB1950-10 49 "d:m:s" (i) declination (B1950) (pos.eq.dec;meta.main)
BMtype    [- I:] cluster classification in the Bautz- Morgan system (src.class.struct)
Count 54 ct [0,] number of cluster members between m3 and m3+2, corrected for background (meta.number)
Xpos288 mm rectangular coordinates of the apparent cluster center, referred to the south-east (lower left) edge of the Palomar Sky Survey prints (x coordinate) (pos.cartesian.x;instr.plate)
Ypos262 mm same with above (y coordinate) (pos.cartesian.y;instr.plate)
GLON249.37 deg galactic longitude l2 (pos.galactic.lon)
GLAT 33.27 deg galactic latitude b2 (pos.galactic.lat)
z    cluster redshift from Struble and Rood (1987ApJS...63..555S) (src.redshift)
Rich1  richness, from Abell (1958ApJS....3..211A) (Note)   (src.class.richness)
Dclass6  distance class, from Abell (Note 1958)   (src.class.distance)
m1017.5 mag red magnitude of the tenth brightest cluster member, from Abell (1958) (phot.mag)

_RA.icrs09 58.4 "h:m:s" (i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
_DE.icrs-11 03 "d:m:s" (i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)
  
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