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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=2093
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ColumnValue  Explain   (UCD)
_RAJ200015 34 17.2 "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+37 02 02 "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)
_RAB195015 32 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+37 12 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)
_Glon059.4769 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+54.4056 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)
2093recno 2093  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

ACO2093  (i) [1,2712] "Abell" number (meta.id;meta.main)
RAB195015 32.4 "h:m:s" (i) right ascension (B1950) (pos.eq.ra;meta.main)
DEB1950+37 12 "d:m:s" (i) declination (B1950) (pos.eq.dec;meta.main)
BMtypeIII   [- I:] cluster classification in the Bautz- Morgan system (src.class.struct)
Count 90 ct [0,] number of cluster members between m3 and m3+2, corrected for background (meta.number)
Xpos122 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)
Ypos257 mm same with above (y coordinate) (pos.cartesian.y;instr.plate)
GLON 59.48 deg galactic longitude l2 (pos.galactic.lon)
GLAT 54.41 deg galactic latitude b2 (pos.galactic.lat)
z    cluster redshift from Struble and Rood (1987ApJS...63..555S) (src.redshift)
Rich2  richness, from Abell (1958ApJS....3..211A) (Note)   (src.class.richness)
Dclass5  distance class, from Abell (Note 1958)   (src.class.distance)
m1017.2 mag red magnitude of the tenth brightest cluster member, from Abell (1958) (phot.mag)

_RA.icrs15 34.3 "h:m:s" (i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
_DE.icrs+37 02 "d:m:s" (i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)
  
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