d2Telescopii


The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog


catalogues and names d2Tel, HR 6938, HD 170523, SAO 229095
constellation Telescopium

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)


position, motion, parallax:

position (J2000) RA: 18h 32min 2sec DEC: -45 45' 26''
position (J1900) RA: 18h 24min 38,2sec DEC: -45 49' 33''
proper motion (J2000) RA: 0,004 arcsec/a DEC: -0,008 arcsec/a
radial velocity 8 km/s
note: spectroscopic binaries, single lined spectra
note: orbital data avaible
rotational velocity 24 km/s (uncertain) (variable)

magnitude

visual magnitude 5,07
(V on UBV Johnson system)

spectral / color information

spectral class B3III
B-V-magnitude -0,14
U-B-magnitude -0,56

double/multiple star system information

note (category: spectroscopic binaries): 21.7056d, K 34.9k/s, V0 -7.6k/s, asini 10.2.

miscellaneous information

note (category: group membership): Sco-Cen assoc.; Sco-Cen cluster?

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000) RA: 18h 32min 1,949sec DEC: -45 45' 26,67'' 0,19 arcsec source: 16
proper motion (J2000) RA: 0,0002 arcsec/a DEC: -0,018 arcsec/a source: 25
radial velocity 8 km/s source: 25
galactic coord. (B1950) longitude: 349,23 latitude: -15,91
GCI unit vector (J2000) X: 0,097199 Y: -0,690894 Z: -0,716392

magnitude:

visual 5,07 (observed) source: 25
photovisual 5,2 source: 16

spectral information:

spectral class B5 source: 96
Morgan-Keenan B3III source: 25
B-magnitude 4,93 0,05 B-V-magnitude -0,14
U-magnitude 4,37 0,05 U-B-magnitude -0,56

sources:

16 PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
25 Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
96 SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (J1950) RA: 18h 28min 20,114sec DEC: -45 47' 37,43'' 0,026 arcsec
position (J2000) RA: 18h 32min 1,982sec DEC: -45 45' 26,19''
proper motion J1950 (FK4) RA: 0,0004 arcsec/a DEC: -0,006 arcsec/a 0,005 arcsec/a in RA
0,005 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0003 arcsec/a DEC: -0,008 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,3 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class B5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue GC, catalogue number: 25273
Durchmusterung CD-4512556
Boss General Catalogue 25273
Henry Draper Catalogue 170523