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VizieR

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III/260/catalog General Catalogue of Ap and Am stars (Renson+ 2009)
Catalogue of Ap, HgMn and Am stars (version 2009) (8205 rows)
  recno=6449
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ColumnValue  Explain   (UCD)
_RAJ200018 42 37.9500 "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+55 32 22.000 "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)
_RAB195018 41 39.7521 "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+55 29 18.739 "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)
_Glon084.9393143 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+23.2852793 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)
6449recno 6449  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

n_Seq*   [/?* ] Peculiarity probability note (Note 1)   (meta.note)
Seq48580  (i) [1/61790] Running number in the catalog (Note 2)   (meta.id;meta.main)

NN  N indicates a note in notes.dat file (meta.ref.url)

SpTypeA0 Hg Mn  Spectral classification (Note 8)   (src.spType)
HD173524   [1/359083] HD(E) identification (meta.id)
m_HD   Multiplicity indicator (Note 3)   (meta.code.multip)
HIP 91755   [1/120404] Hipparcos catalogue (I/239) (meta.id)
m_HIP   Multiplicity indicator (Note 3)   (meta.code.multip)
HR7049   [1/9110] HR (V/50) identification (meta.id)
m_HR   Multiplicity indicator (Note 3)   (meta.code.multip)
DMBD+55 2107  Durchmusterung (BD, CD, CP) designation (Note 4)   (meta.id)
m_DM   Multiplicity indicator (Note 3)   (meta.code.multip)
TYC3922-2095-1  Tycho-2 catalogue (I/259) (meta.id)
Name46 Dra  Bayer / Flamsteed name (Note 5)   (meta.id)
Vmag 5.1 mag Magnitude, generally V (Note 6)   (phot.mag;em.opt.V)
B-V-0.09 mag B-V colour index (Note 7)   (phot.color;em.opt.B;em.opt.V)
U-B-0.28 mag U-B colour index (Note 7)   (phot.color;em.opt.U;em.opt.B)
b-y-0.035 mag b-y from Stroemgren photometry (phot.color;em.opt.B;em.opt.V)
m1 0.122 mag m1 = (v-b)-(b-y) from Stroemgren (phot.color)
c1 0.802 mag c1 = (u-v)-(v-b) from Stroemgren (phot.color)
Hbeta 2.790 mag H-beta index from Stroemgren (spect.index;em.line.Hbeta)
NoteCodeNDA BHR   [ABCDHNPRSV* ] Notes detailed in notes.dat (Note G1)   (meta.note)

SimbadSimbad  ask the Simbad data-base about this object (meta.ref)

RA190018 40 41.7 "h:m:s" Right Ascension 1900 (pos.eq.ra)
DE1900+55 26 17 "d:m:s" Declination 1900 (pos.eq.dec)
RAJ200018 42 37.95 "h:m:s" (i) Right Ascension J2000 (pos.eq.ra;meta.main)
DEJ2000+55 32 22.0 "d:m:s" (i) Declination J2000 (pos.eq.dec;meta.main)
  
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