VizieR

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VizieR

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VII/231/catalog Catalog of bright diffuse Galactic nebulae (Cederblad, 1946)
Catalog of bright diffuse Galactic nebulae (330 rows)
  recno=75
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ColumnValue  Explain   (UCD)
_RAJ200005 31 25.3 "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+34 14 38 "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)
_RAB195005 28 06.5 "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+34 12 26 "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)
_Glon173.8992 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 +0.2816 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)
75recno 75  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Ced 49  (i) [1/215] Sequential number (Ced NNNa in Simbad) (meta.id;meta.main)
m_Ced    [a-z] Subdivision letter (meta.code.multip)
NameNGC 1931  Other name of the nebula (meta.id)
RA190005 24.8 "h:m:s" (i) Right ascension (1900) (pos.eq.ra;meta.main)
u_RA1900   Uncertainty flag on right ascension (meta.code.error;pos.eq.ra)
DE1900+34 10 "d:m:s" (i) Declination (1900) (pos.eq.dec;meta.main)
u_DE1900   Uncertainty flag on Declination (meta.code.error;pos.eq.dec)
StarCl  Star name (meta.id.assoc)
pmag 9.70 mag Photographic magnitude of the star (phot.mag;em.opt.B)
u_pmag:   [v:] Uncertainty flag on pmag (v: variable) (meta.code.error)
vmag  mag Visual magnitude of the star (phot.mag;em.opt.V)
u_vmag    [v:] Uncertainty flag on vmag (v: variable) (meta.code.error)
SpType   Spectrum of the star associated with the nebula (meta.id.assoc)
loga1 0.024 [arcmin] Value of log(a1) in Hubble's law (Note 1)   (stat.fit.param)
n_loga1    [:] ":" when no reduction to Hubble's system has been possible (meta.note)
SpNeb   Spectrum of the nebula (Note 2)   (meta.note)
ClassA 3  Nebular class (Note 3)   (src.class)
Dim1 3.0 arcmin Apparent dimension of the nebula (phys.size)
Dim2 3.0 arcmin Apparent dimension of the nebula (phys.size)
n_Dim2    [?:v] Notes on dimensions (v: variable) (meta.note)
plx 0.0004 arcsec Adopted parallax (pos.parallax.phot)
u_plx:  Uncertainty flag on plx (meta.code.error;pos.parallax)
Methodn  Parallax method used (Note 4)   (meta.note)
Dist2500 pc Adopted Distance (pos.distance;pos.heliocentric)
u_Dist:  Uncertainty flag on Dist (meta.code.error)
x-1958 pc Linear heliocentric galactic coordinate (x=r*cosl*cosb) (Note 5)   (pos.distance;pos.cartesian.x;pos.galactic)
y 1555 pc Linear heliocentric galactic coordinate (y=r*sinl*cosb) (Note 5)   (pos.cartesian.y)
z 650 pc Linear heliocentric galactic coordinate (z=r*sinb) (Note 5)   (src.redshift)

NotesNotes  Detailed notes and references (meta.ref.url)
_RA.icrs05 31.4 "h:m:s" (i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
_DE.icrs+34 15 "d:m:s" (i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)
  
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