d2Apodis


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 d2Aps, HR 6021, HD 145388, SAO 257381
constellation Apus

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


position, motion, parallax:

position (J2000) RA: 16h 20min 26,8sec DEC: -78 40' 2''
position (J1900) RA: 16h 5min 30,7sec DEC: -78 24' 57''
proper motion (J2000) RA: -0,007 arcsec/a DEC: -0,025 arcsec/a
radial velocity -10 km/s
trigonometric parallax 0,02 arcsec

magnitude

visual magnitude 5,27
(V on UBV Johnson system)

spectral / color information

spectral class K3III
B-V-magnitude 1,41
U-B-magnitude 1,62
R-I-magnitude 0,56 (Eggen)

double/multiple star system information

number of components of multiple star system 3
separation 102,9 arcsec
mag difference (of double or brightest multiple) 0,4
component ID AB
note Worley (1978) update of the IDS
note (category: double and multiple data): Physical pair with HR 6020.

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

position, motion, parallax:

position (J2000) RA: 16h 20min 26,828sec DEC: -78 40' 2,81'' 0,19 arcsec source: 16
proper motion (J2000) RA: -0,0018 arcsec/a DEC: -0,026 arcsec/a source: 25
radial velocity -10 km/s source: 25
trigonometric parallax 0,02 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 312,45 latitude: -19,88
GCI unit vector (J2000) X: -0,082698 Y: -0,178254 Z: -0,980503

magnitude:

visual 5,27 (observed) source: 25
photovisual 5,3 source: 16

spectral information:

spectral class K5 source: 96
Morgan-Keenan K3III source: 25
B-magnitude 6,68 0,05 B-V-magnitude 1,41
U-magnitude 8,3 0,05 U-B-magnitude 1,62

double/multiple star system information:

source of data: 25
separation between brightest and second brightest component 102,9 arcsec
magnitude difference between brightest and second brightest component 0,4

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: 16h 12min 54,659sec DEC: -78 32' 44,26'' 0,022 arcsec
position (J2000) RA: 16h 20min 26,798sec DEC: -78 40' 2,49''
proper motion J1950 (FK4) RA: 0,0004 arcsec/a DEC: -0,024 arcsec/a 0,006 arcsec/a in RA
0,004 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0025 arcsec/a DEC: -0,025 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class K5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue GC, catalogue number: 21865
Durchmusterung CP-78 1093
Boss General Catalogue 21865
Henry Draper Catalogue 145388