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I/350/tyc2tdsc

Gaia EDR3 (Gaia Collaboration, 2020)

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Tycho-2 merged with the TDSC catalog and TDSC supplement (2561887 rows)

recno=2462441

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*Column*	*Value*		*Explain (UCD)*
_RAJ2000	07 22 49.3749762914	"h:m:s"	Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra) (POS_EQ_RA)
_DEJ2000	-68 48 52.437987984	"d:m:s"	Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec) (POS_EQ_DEC)
_RAB1950	07 22 56.5587650075	"h:m:s"	Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra) (POS_EQ_RA)
_DEB1950	-68 42 58.357176929	"d:m:s"	Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec) (POS_EQ_DEC)
_Glon	280.1482011138174	deg	Galactic longitude at Epoch=J1990, proper motions taken into account (pos.galactic.lon) (POS_GAL_LON)
_Glat	-22.4116846599553	deg	Galactic latitude at Epoch=J1990, proper motions taken into account (pos.galactic.lat) (POS_GAL_LAT)
2462441recno	2462441		Record number assigned by the VizieR team. Should Not be used for identification. (meta.record) (RECORD)

IDTyc2	9179-749-1		⁽ⁱ⁾ Tycho-2 identifier (TYC1-TYC2-TYC3) (id) (meta.id;meta.main) (ID_MAIN)
HIP			⁽ⁱ⁾ Hipparcos number (hip) (meta.id.cross) (ID_NUMBER)
TYC1	9179		TYC1 component from TYC or GSC (tyc1) (meta.id.part;meta.main) (ID_NUMBER)
TYC2	749		TYC2 component from TYC or GSC (tyc2) (meta.id.part;meta.main) (ID_NUMBER)
TYC3	1		TYC2 component from TYC or GSC (tyc3) (meta.id.part;meta.main) (ID_NUMBER)
TYC	9179007491		Numeric Tycho-2 identifier ((tyc11000000)+(tyc210)+(tyc3)) (id_tycho) (meta.id;meta.dataset) (ID_NUMBER)
IDTyc1	T		Tycho-1 star (tyc) (meta.code) (ID_NUMBER)
RAT	110.70576750000	deg	⁽ⁱ⁾ Observed Tycho-2 Right Ascension (ICRS) at epoch 1990+EpRA1990 (ra) (pos.eq.ra;meta.main) (POS_EQ_RA_MAIN)
e_RAT	24.7	mas	Uncertainty RA*cos(dec), of observed Tycho-2 RA (e_radeg) (stat.error) (ERROR)
DET	-68.81459833000	deg	⁽ⁱ⁾ Observed Tycho-2 Declination (ICRS) at epoch 1990+EpDE1990 (dec) (pos.eq.dec;meta.main) (POS_EQ_DEC_MAIN)
e_DET	23.3	mas	Uncertainty of observed Tycho-2 Dec (e_dedeg) (stat.error) (ERROR)
RAmdeg	110.70573511000	deg	Mean Right Ascension (ICRS) at Ep=J2000 (ra_mdeg) (pos.eq.ra) (POS_EQ_RA_OTHER)
e_RAmdeg	25.0	mas	Uncertainty RA*cos(dec),at mean epoch (e_ramdeg) (stat.error) (ERROR)
DEmdeg	-68.81457171000	deg	Mean Declination (ICRS) at Ep=J2000 (de_mdeg) (pos.eq.dec) (POS_EQ_DEC_OTHER)
e_DEmdeg	23.0	mas	Uncertainty of Dec at mean epoch (e_demdeg) (stat.error) (ERROR)
pmRA	-5.0	mas/yr	⁽ⁱ⁾ Proper motion in right ascension, pmRA*cos(DE) (pm_ra) (pos.pm;pos.eq.ra) (POS_EQ_PMRA)
e_pmRA	3.1	mas/yr	Uncertainty proper motion in RA*cos(dec) (e_pmra) (stat.error;pos.pm;pos.eq.ra) (ERROR)
pmDE	11.6	mas/yr	⁽ⁱ⁾ Proper motion in Declination (pm_de) (pos.pm;pos.eq.dec) (POS_EQ_PMDEC)
e_pmDE	2.9	mas/yr	Uncertainty of proper motion in Dec (e_pmde) (stat.error;pos.pm;pos.eq.dec) (ERROR)
EpRA1990	1.66	yr	Epoch-1990 of RAdeg (ep_ra1990) (time.epoch) (TIME_EPOCH)
EpDE1990	1.70	yr	Epoch-1990 of DEdeg (ep_de1990) (time.epoch) (TIME_EPOCH)
EpRAmdeg	1990.78	yr	Mean epoch of RAmdeg (ep_ram) (time.epoch) (TIME_EPOCH)
EpDEmdeg	1990.86	yr	Mean epoch of DEmdeg (ep_dem) (time.epoch) (TIME_EPOCH)
Num	3		Number of positions used for forming mean data (num) (meta.number) (NUMBER)
Corr	0.1		Correlation (RAdeg,DEdeg) (corr) (stat.correlation;pos.eq.ra;pos.eq.dec) (STAT_CORRELATION)
q_RAmdeg	1.0		Goodness of fit for mean RA (q_ramdeg) (meta.code.qual) (CODE_QUALITY)
q_DEmdeg	0.0		Goodness of fit for mean DE (q_demdeg) (meta.code.qual) (CODE_QUALITY)
q_pmDE	0.1		Goodness of fit for pmDe (q_pmde) (meta.code.qual) (CODE_QUALITY)
q_pmRA	1.0		Goodness of fit for pmRa (q_pmra) (meta.code.qual) (CODE_QUALITY)
pflag			Mean position flag (pflag) (meta.code) (CODE_MISC)
posflg			Type of Tycho-2 solution (posflg) (meta.id;stat.fit) (CODE_MISC)
CCDM			CCDM component identifier for HIP stars (ccdm) (meta.code.multip) (CODE_MISC)
prox	999		Proximity indicator (prox) (meta.code) (CODE_MISC)
BTmag	10.806	mag	Tycho-2 BT magnitude (bt_mag) (phot.mag;em.opt.B) (PHOT_TYCHO_B)
e_BTmag	0.038	mag	Uncertainty of BTmag (e_btmag) (stat.error) (ERROR)
VTmag	10.528	mag	Tycho-2 VT magnitude (vt_mag) (phot.mag;em.opt.V) (PHOT_TYCHO_V)
e_VTmag	0.040	mag	Uncertainty of VTmag (e_vtmag) (stat.error) (ERROR)
TDSC			⁽ⁱ⁾ TDSC identifier for the system (sys_no) (meta.id) (ID_ALTERNATIVE)
cmp			Component designation (cmp) (meta.id.part) (ID_MAIN:2)
Nmain			Number of components in TDSC main catalogue (n_main) (meta.number) (NUMBER)
Nsup			Number of components in the TDSC supplement (n_sup) (meta.number) (NUMBER)
magflg			TDSC photometry flag (magflg) (meta.code) (CODE_MISC)
WDS			⁽ⁱ⁾ WDS identifier for the system (wds) (meta.id.cross) (ID_ALTERNATIVE)
Note			TDSC notes (note) (meta.note) (NOTE)
HD			HD identifier for TDSC entries (hd) (meta.id.cross) (ID_ALTERNATIVE)
rcmp			Reference component for position angle and separation (rcmp) (meta.id.assoc) (ID_MAIN:2)
PA		deg	Position angle of the present component (cmp) with respect to the reference component (rcmp) (pa) (pos.posAng) (POS_POS-ANG)
e_PA		deg	Uncertainty of the position angle (e_pa) (stat.error) (ERROR)
Sep		arcsec	Separation of the present component (cmp) with respect to the reference component (rcmp) (sep) (pos.angDistance) (ORBIT_DISTANCE)
e_Sep		mas	Uncertainty of the separation (e_sep) (stat.error) (ERROR)
e_PA.Sep			Uncertainty of the position angle * separation (e_pasep) (stat.error) (ERROR)

_RA.icrs	110.70572906788	deg	⁽ⁱ⁾ Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra) (POS_EQ_RA_OTHER)
_DE.icrs	-68.81456610777	deg	⁽ⁱ⁾ Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec) (POS_EQ_DEC_OTHER)

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