m Draconis


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 m Dra, 21 Dra, HR 6369, HD 154905, SAO 30239, WDS 17053+5428A
constellation Draco

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


position, motion, parallax:

position (J2000) RA: 17h 5min 19,8sec DEC: +54 28' 13''
position (J1900) RA: 17h 3min 15,3sec DEC: +54 36' 7''
proper motion (J2000) RA: -0,073 arcsec/a DEC: 0,085 arcsec/a
radial velocity -18 km/s
rotational velocity 23 km/s (uncertain) (variable)
trigonometric parallax 0,046 arcsec
note (category: dynamical parallaxes): 0.039".

magnitude

visual magnitude 5,83
(original HR magnitude)

spectral / color information

spectral class F7V
note (category: spectra): Combined with HR 6370.

double/multiple star system information

number of components of multiple star system 3
separation 2 arcsec
mag difference (of double or brightest multiple) 0,1
component ID AB
note (category: double and multiple data): Binary with HR 6370, q.v., B* 3.2y, a = 0.026"; or 7.4y, a = 0.013", 0.2 solar mass. (Some uncertainty if unseen astrometric companion is A* or B*.)

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

position, motion, parallax:

position (J2000) RA: 17h 5min 20,166sec DEC: +54 28' 13,22'' 0,2 arcsec source: 52
proper motion (J2000) RA: -0,0086 arcsec/a DEC: 0,089 arcsec/a source: 25
radial velocity -18 km/s source: 25
trigonometric parallax 0,046 0,005 arcsec source: 25
galactic coord. (B1950) longitude: 82,3 latitude: 37,02
GCI unit vector (J2000) X: -0,137297 Y: -0,564672 Z: 0,813815

magnitude:

visual 5,7 (observed) source: 25
photovisual 5,8 source: 2
photographic 6,2 source: 16

spectral information:

spectral class F5 source: 29
Morgan-Keenan F7V source: 25
B-magnitude 5,402 0,05 B-V-magnitude 0,484

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 2,2 arcsec
magnitude difference between brightest and second brightest component 0
position angle 29

component magnitude spectral class catalogue(s)/name(s)
A 5,65 - Arrakis, m Draconis, 21 Dra, HR 6370, HD 154906, SAO 30239
B 5,7 F5 m Draconis, 21 Dra, HR 6369, HD 154905, SAO 30239

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
29 SAOJ2000
SAO on FK5 at J2000, 1989
52 PPMN-HP subset
PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H)

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

position and proper motion:

position (J1950) RA: 17h 4min 17,357sec DEC: +54 32' 7,95'' 0,018 arcsec
position (J2000) RA: 17h 5min 19,757sec DEC: +54 28' 13,33''
proper motion J1950 (FK4) RA: -0,0091 arcsec/a DEC: 0,084 arcsec/a 0,003 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0084 arcsec/a DEC: 0,085 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 5,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from Harvard or San Luis photometry.

spectral information:

spectral class F5
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: 23092
Durchmusterung BD+54 1857
Boss General Catalogue 23092
Henry Draper Catalogue 154905
The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given.

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

position and proper motion:

position (J2000) RA: 17h 5,3min DEC: +54 28'
proper motion (J2000) RA: -0,11 arcsec/a DEC: 0,067 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 211 4,3'' 5,8 5,8 F7V STF2130
1993 29 2,2''
AC 1925 3 179 13,8'' 5,8 13,8 - BU 1088
1958 175 13,2''
BC 1889 11 191 12,3'' 5,8 13,7 - BU 1088
1958 186 13,6''

discoverer information:

discoverer code discoverer reference
STF2130 Struve, F.G.W. -
BU 1088 Burnham, S.W. -

notes:

note Mu Dra. P = 672yr., a = 3.94", motion retrograde. C is physical. AC: Mt. Wilson spectral types F5s.