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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=1758
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ColumnValue  Explain   (UCD)
_RAJ200013 32 32.1 "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+50 30 37 "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)
_RAB195013 30 30.0 "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+50 46 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)
_Glon107.1569 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+65.3406 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)
1758recno 1758  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

ACO1758  (i) [1,2712] "Abell" number (meta.id;meta.main)
RAB195013 30.5 "h:m:s" (i) right ascension (B1950) (pos.eq.ra;meta.main)
DEB1950+50 46 "d:m:s" (i) declination (B1950) (pos.eq.dec;meta.main)
BMtypeIII   [- I:] cluster classification in the Bautz- Morgan system (src.class.struct)
Count198 ct [0,] number of cluster members between m3 and m3+2, corrected for background (meta.number)
Xpos252 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)
Ypos349 mm same with above (y coordinate) (pos.cartesian.y;instr.plate)
GLON107.16 deg galactic longitude l2 (pos.galactic.lon)
GLAT 65.34 deg galactic latitude b2 (pos.galactic.lat)
z 0.2800   cluster redshift from Struble and Rood (1987ApJS...63..555S) (src.redshift)
Rich3  richness, from Abell (1958ApJS....3..211A) (Note)   (src.class.richness)
Dclass6  distance class, from Abell (Note 1958)   (src.class.distance)
m1018.0 mag red magnitude of the tenth brightest cluster member, from Abell (1958) (phot.mag)

_RA.icrs13 32.5 "h:m:s" (i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
_DE.icrs+50 31 "d:m:s" (i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)
  
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