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 t2Ser, 12 Ser, HR 5770, HD 138527, SAO 101600
constellation Serpens

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

position, motion, parallax:

position (J2000) RA: 15h 32min 9,7sec DEC: +16 3' 22''
position (J1900) RA: 15h 27min 33,1sec DEC: +16 23' 43''
proper motion (J2000) RA: 0,001 arcsec/a DEC: 0,009 arcsec/a
radial velocity -18 km/s
note: variable radial velocity
rotational velocity 175 km/s (uncertain) (variable)


visual magnitude 6,22
(V on UBV Johnson system)

spectral / color information

spectral class B9V
B-V-magnitude -0,05
U-B-magnitude -0,23

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

position, motion, parallax:

position (J2000) RA: 15h 32min 9,68sec DEC: +16 3' 21,94'' 0,35 arcsec source: 17
proper motion (J2000) RA: -0,0003 arcsec/a DEC: 0,003 arcsec/a source: 25
radial velocity -18 km/s source: 25
galactic coord. (B1950) longitude: 24,8 latitude: 51,22
GCI unit vector (J2000) X: -0,577799 Y: -0,767889 Z: 0,276578


visual 6,22 (observed) source: 25
photovisual 6,1 source: 2
photographic 6,1 source: 16

spectral information:

spectral class B9 source: 96
Morgan-Keenan B9V source: 25
B-magnitude 6,17 0,05 B-V-magnitude -0,05
U-magnitude 5,94 0,05 U-B-magnitude -0,23


2 HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
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
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991
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: 15h 29min 51,309sec DEC: +16 13' 28,43'' 0,024 arcsec
position (J2000) RA: 15h 32min 9,694sec DEC: +16 3' 22,34''
proper motion J1950 (FK4) RA: 0 arcsec/a DEC: 0,005 arcsec/a 0,004 arcsec/a in RA
0,004 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0001 arcsec/a DEC: 0,009 arcsec/a
source of proper motion data Determined by source catalog


visual 6,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class B9
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue GC, catalogue number: 20880
Durchmusterung BD+16 2797
Boss General Catalogue 20880
Henry Draper Catalogue 138527