VizieR

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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=520
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ColumnValue  Explain   (UCD)
_RAJ200004 54 19.0 "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+02 56 49 "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)
_RAB195004 51 42.0 "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+02 52 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)
_Glon195.8023 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-24.2840 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)
520recno 520  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

ACO 520  (i) [1,2712] "Abell" number (meta.id;meta.main)
RAB195004 51.7 "h:m:s" (i) right ascension (B1950) (pos.eq.ra;meta.main)
DEB1950+02 52 "d:m:s" (i) declination (B1950) (pos.eq.dec;meta.main)
BMtypeIII   [- I:] cluster classification in the Bautz- Morgan system (src.class.struct)
Count186 ct [0,] number of cluster members between m3 and m3+2, corrected for background (meta.number)
Xpos188 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)
Ypos320 mm same with above (y coordinate) (pos.cartesian.y;instr.plate)
GLON195.81 deg galactic longitude l2 (pos.galactic.lon)
GLAT-24.28 deg galactic latitude b2 (pos.galactic.lat)
z 0.2030   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)
m1017.4 mag red magnitude of the tenth brightest cluster member, from Abell (1958) (phot.mag)

_RA.icrs04 54.3 "h:m:s" (i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
_DE.icrs+02 57 "d:m:s" (i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)
  
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