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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=1656
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ColumnValue  Explain   (UCD)
_RAJ200012 59 48.7 "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+27 58 51 "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)
_RAB195012 57 24.0 "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+28 15 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)
_Glon058.0815 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+87.9576 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)
1656recno 1656  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

ACO1656  (i) [1,2712] "Abell" number (meta.id;meta.main)
RAB195012 57.4 "h:m:s" (i) right ascension (B1950) (pos.eq.ra;meta.main)
DEB1950+28 15 "d:m:s" (i) declination (B1950) (pos.eq.dec;meta.main)
BMtypeII   [- I:] cluster classification in the Bautz- Morgan system (src.class.struct)
Count106 ct [0,] number of cluster members between m3 and m3+2, corrected for background (meta.number)
Xpos256 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)
Ypos108 mm same with above (y coordinate) (pos.cartesian.y;instr.plate)
GLON 58.09 deg galactic longitude l2 (pos.galactic.lon)
GLAT 87.96 deg galactic latitude b2 (pos.galactic.lat)
z 0.0232   cluster redshift from Struble and Rood (1987ApJS...63..555S) (src.redshift)
Rich2  richness, from Abell (1958ApJS....3..211A) (Note)   (src.class.richness)
Dclass1  distance class, from Abell (Note 1958)   (src.class.distance)
m1013.5 mag red magnitude of the tenth brightest cluster member, from Abell (1958) (phot.mag)

_RA.icrs12 59.8 "h:m:s" (i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
_DE.icrs+27 59 "d:m:s" (i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)
  
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