V2391 Oph

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. The Washington Visual Double Star Catalog, 1996.0

catalogues and names V2391 Oph, 70 Oph, HR 6752, HD 165341, SAO 123107, WDS 18055+0230A
constellation Ophiuchus

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: 18h 5min 27,3sec DEC: +2° 29' 58''
position (J1900) RA: 18h 0min 24,1sec DEC: +2° 31' 22''
proper motion (J2000) RA: 0,266 arcsec/a DEC: -1,093 arcsec/a
radial velocity -7 km/s
note: spectroscopic binaries
note: orbital data avaible
rotational velocity 16 km/s (uncertain) (variable)
trigonometric parallax 0,201 arcsec
note (category: dynamical parallaxes): 0.198".

magnitude

visual magnitude 4,03
(V on UBV Johnson system)

spectral / color information

spectral class K0V
B-V-magnitude 0,86
U-B-magnitude 0,54
R-I-magnitude 0,46

double/multiple star system information

number of components of multiple star system 11
separation 1,9 arcsec
mag difference (of double or brightest multiple) 1,8
component ID AB
note (category: double and multiple data): AB 4.20 K0V, 5.99 K4V, 88.13y, a = 4.545". B is 6.00V, +1.15(B-V), vsini =<25k/s. Aitken listed 9 additional faint companions within 180".
note (category: spectroscopic binaries): ADS 11046AB, 88.13y D, K 3.4k/s, V0 -7.1k/s, asini 1300.

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

position, motion, parallax:

position (J2000) RA: 18h 5min 27,386sec DEC: +2° 29' 58,63'' ±0,2 arcsec source: 52
proper motion (J2000) RA: 0,019 arcsec/a DEC: -1,099 arcsec/a source: 25
radial velocity -7 km/s source: 25
trigonometric parallax 0,201 ±0,02 arcsec source: 25
galactic coord. (B1950) longitude: 29,91° latitude: 11,38°
GCI unit vector (J2000) X: 0,023783 Y: -0,998765 Z: 0,043613

magnitude:

visual 4,03 (observed) source: 25
photovisual 4,1 source: 2
photographic 4,9 source: 16

spectral information:

spectral class K0 source: 96
Morgan-Keenan K0-V source: 25
B-magnitude 4,89 ±0,05 B-V-magnitude 0,86
U-magnitude 5,43 ±0,05 U-B-magnitude 0,54

double/multiple star system information:

source of data: 19
magnitude difference between brightest and second brightest component 1,97

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
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
19 WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
25 Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
52 PPMN-HP subset
PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H)
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 2min 55,608sec DEC: +2° 30' 34,62'' ±0,01 arcsec
position (J2000) RA: 18h 5min 27,347sec DEC: +2° 29' 58,28''
proper motion J1950 (FK4) RA: 0,0172 arcsec/a DEC: -1,094 arcsec/a ±0,002 arcsec/a in RA
±0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0177 arcsec/a DEC: -1,093 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class K0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue GC, catalogue number: 24641
Durchmusterung BD+02 3482
Boss General Catalogue 24641
Henry Draper Catalogue 165341

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 18h 5,5min DEC: +2° 30'
proper motion (J2000) RA: 0,227 arcsec/a DEC: 0 arcsec/a

double/multiple star system information:

component year number of measures position angle angular separation magnitude of 1st component magnitude of 2nd component spectral class(es) discoverer code
AB 1819 often ° '' 4,03 6 K0V K4V STF2272
Aa 1878 42 198° 71,4'' 4,1 13 - STF2272
1947 282° 34,9''
Ab 1905 16 252° 70'' 4,1 14 - STF2272
1946 287° 76,7''
AR 1905 20 73° 105'' 4,1 13 - STF2272
1946 50° 119,4''
AS 1878 often 50° 87,2'' 4,1 12,5 - STF2272
1946 22° 141,1''
AT 1905 20 103° 120,3'' 4,1 13,1 - STF2272
1946 80° 110,6''
AU 1905 15 329° 142,4'' 4,1 13 - STF2272
1945 334° 184,5''
AV 1886 26 224° 165,9'' 4,1 11,8 - STF2272
1946 246° 138,6''
AW 1924 1 4° 158,3'' 4,1 - - STF2272
Ba 1899 4 208° 50,8'' 6,3 - - STF2272
1932 252° 32,4''
Bb 1900 1 247° 69,3'' 6,3 - - STF2272
BR 1900 1 168° 68,4'' 6,3 - - STF2272
VT 1906 1 73° 247,9'' 11,8 13,1 - STF2272
VW 1906 1 270° 180,5'' 11,8 12,6 - STF2272
VX 1906 1 250° 16,6'' 11,8 13,5 - STF2272

discoverer information:

discoverer code discoverer reference
STF2272 Struve, F.G.W. -

notes:

note 70 Oph. AB: P = 88.3yr., a = 4.56", motion retrograde. Spectral types K0V, K4V. Proper motion of A +227 -1093.