t1Serpentis

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

  4. Combined General Catalogue of Variable Stars (suspected variables)

catalogues and names t1Ser, NSV 07074, 9 Ser, HR 5739, HD 137471, SAO 101545, FK5: 570
constellation Serpens

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


object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 15h 25min 47,4sec DEC: +15° 25' 41''
position (J1900) RA: 15h 21min 9sec DEC: +15° 46' 47''
proper motion (J2000) RA: -0,013 arcsec/a DEC: -0,007 arcsec/a
radial velocity -20 km/s
note: suspected variable radial velocity
trigonometric parallax 0,013 arcsec

magnitude

visual magnitude 5,17
(V on UBV Johnson system)

spectral / color information

spectral class M1III
B-V-magnitude 1,66
U-B-magnitude 1,95
R-I-magnitude 1,04

variability information

variable star identification 7074

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

position, motion, parallax:

position (J2000) RA: 15h 25min 47,401sec DEC: +15° 25' 40,87'' ±0,06 arcsec source: 15
proper motion (J2000) RA: -0,0009 arcsec/a DEC: -0,007 arcsec/a source: 25
radial velocity -20 km/s source: 25
trigonometric parallax 0,013 ±0,001 arcsec source: 25
galactic coord. (B1950) longitude: 22,86° latitude: 52,36°
GCI unit vector (J2000) X: -0,600773 Y: -0,753857 Z: 0,266028

magnitude:

visual 5,17 (observed) source: 25
photovisual 5,5 source: 2

spectral information:

spectral class M0 source: 96
Morgan-Keenan M1III source: 25
B-magnitude 6,83 ±0,05 B-V-magnitude 1,66
U-magnitude 8,78 ±0,05 U-B-magnitude 1,95

sources:

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
15 FK5, FK5 Extension and FK5 Supplement
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 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 23min 28,116sec DEC: +15° 36' 9,65'' ±0,005 arcsec
position (J2000) RA: 15h 25min 47,396sec DEC: +15° 25' 40,74''
proper motion J1950 (FK4) RA: -0,001 arcsec/a DEC: -0,012 arcsec/a ±0,001 arcsec/a in RA
±0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0009 arcsec/a DEC: -0,008 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,5 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class M0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 570
Durchmusterung BD+15 2858
Boss General Catalogue 20740
Henry Draper Catalogue 137471

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 15h 23min 28,1sec DEC: +15° 36' 10''

variability informations:

magnitute at max. brightness 5,13
magnitute at min. brightness 5,2
photometric system visual, photovisual or Johnson's V

spectral information

spectral class M1

references

to a study 300015D (designation: HR 5739)