Tegmine
catalogues and names
catalogues and names | Tegmine, z1Cnc, 16 Cnc, HR 3208, HD 68257, SAO 97645, WDS 08122+1739A |
other names | Tegmen |
constellation | Cancer |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
note (category: star names): | Tegmen; Tegmine. |
position, motion, parallax:
position (J2000) | RA: 8h 12min 12.7sec | DEC: +17° 38' 52'' | ||
position (B1900) | RA: 8h 6min 28.6sec | DEC: +17° 56' 58'' | ||
proper motion (J2000) | RA: 0.066 arcsec/a | DEC: -0.135 arcsec/a | ||
radial velocity | -6 km/s | |||
rotational velocity | 0 km/s (uncertain) (variable) | |||
trigonometric parallax | 0.039 arcsec | |||
galactic coordinates | longitude: 205.3° | latitude: 25.53° |
note (category: dynamical parallaxes): | 0.039". |
magnitude
visual magnitude | 5.63 (V on UBV Johnson system) |
spectral / color information
spectral class | F8V |
B-V-magnitude | 0.54 |
U-B-magnitude | 0.06 |
double/multiple star system information
number of components of multiple star system | 5 |
separation | 0.9 arcsec |
mag difference (of double or brightest multiple) | 0.4 |
component ID | AB |
note (category: double and multiple data): | Combined mag. and color for 3208-9-10, 4.67V, +0.53(B-V). AB 5.63 F7V, 6.02 F9V combined colors (AB), 59.7y, a = 0.884". Component C = HR 3210. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 8h 12min 12.778sec | DEC: +17° 38' 51.5'' | ±0.35 arcsec | source: 17 |
proper motion (J2000) | RA: 0.0056 arcsec/a | DEC: -0.142 arcsec/a | source: 25 | |
radial velocity | -6 km/s | source: 25 | ||
trigonometric parallax | 0.039 arcsec | ±0.004 arcsec | source: 25 | |
galactic coord. (B1950) | longitude: 205.31° | latitude: 25.53° |
magnitude:
visual | 5.63 (observed) | source: 25 |
photovisual | 5.6 | source: 2 |
photographic | 5.2 | source: 16 |
spectral information:
spectral class | G0 | source: 29 | |
Morgan-Keenan | F8V | source: 25 | |
B-magnitude | 6.17 ±0.05 | B-V-magnitude | 0.54 |
U-magnitude | 6.23 ±0.05 | U-B-magnitude | 0.06 |
double/multiple star system information:
magnitude difference between brightest and second brightest component | 0.4 |
component | magnitude | spectral class | catalogue(s)/name(s) |
A | 5.63 | G0 | Tegmine, z1Cancri, 16 Cnc, HR 3208, HD 68257, SAO 97645 |
B | 6.02 | - | z1Cancri, 16 Cnc, HR 3209, HD 68256, SAO 97645 |
C | 6.2 | - | z2Cancri, 16 Cnc, HR 3210, HD 68255, SAO 97646 |
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 | |
17 | ACRS |
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991 | |
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 |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
position (B1950) | RA: 8h 9min 20.753sec | DEC: +17° 47' 59.93'' | ±0.011 arcsec |
position (J2000) | RA: 8h 12min 12.693sec | DEC: +17° 38' 51.87'' | |
proper motion B1950 (FK4) | RA: 0.0047 arcsec/a | DEC: -0.139 arcsec/a | ±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: 0.0046 arcsec/a | DEC: -0.135 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 | G0 |
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: 11141 |
Durchmusterung | BD+18 1867AB |
Boss General Catalogue | 11141 |
Henry Draper Catalogue | 68256 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: 8h 12.2min | DEC: +17° 39' |
proper motion (J2000) | RA: 0.081 arcsec/a | DEC: -0.142 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 | 1826 | often | ° | '' | 5.6 | 6 | F8V | STF1196 |
AB-C | 1821 | often | 160° | 5.3'' | 5.05 | 6.2 | G0V | STF1196 |
1987 | 82° | 5.7'' | ||||||
AB-D | 1887 | 5 | 108° | 293.4'' | - | 9.7 | - | STF1196 |
1984 | - | 283.2'' | ||||||
AC | 1821 | often | 160° | 5.7'' | 5.6 | 6.3 | - | STF1196 |
1992 | 80° | 5.3'' | ||||||
AB-E | 1887 | 1 | 27° | 9.1'' | - | - | - | ENH 1 |
AB-F | 1887 | 1 | 47° | 10.5'' | - | - | - | ENH 1 |
AB-G | 1887 | 1 | 331° | 10.7'' | - | - | - | ENH 1 |
BC | 1840 | often | 155° | 5.6'' | 6 | 6.3 | - | STF1196 |
1965 | 79° | - | ||||||
CD | 1913 | 3 | 108° | 283.6'' | 6.3 | 10.5 | - | STF1196 |
1922 | - | 281'' |
discoverer information:
discoverer code | discoverer | reference |
STF1196 | Struve, F.G.W. | - |
ENH 1 | Engelhardt, von | (Astron. Nachr. 117, 1; 1887.) |
notes:
note | Zeta Cnc. P = 59.7yr., a = 0.88", motion retrograde. AB-C: A premature orbit has been computed. An unseen companion of C with P = 17.2yr. is known. AB-D: D is BD+18@1870. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
position (B1900) | RA: 8h 6.5min | DEC: +17° 57' |
magnitudes, spectral classes, orbital elements:
author: | C. Gasteyer | C. Gasteyer | C. Gasteyer |
date of observation: | 1951 | 1953 | 1953 |
magnitude of component A: | 5.63 | 5.05 | 6.2 |
magnitude of component B: | 5.63 | 5.05 | 6.2 |
spectral class component B: | F8V | G0V | |
spectral class component B: | F8V | G0V | |
period [y]: | 59.7 | 1150 | 17.5 |
semi-major axis [arcsec]: | 0.884 | 7.96 | 0.191 |
inclination [deg]: | 172 | 144.6 | 144 |
node [deg]: | 58 | 256.7 (ascending) | 251 (ascending) |
equinox of node: | 1900 | 1900 | 1900 |
eccentricity: | 0.32 | 0.26 | 0.11 |
time of periastron passage: | 1930 | 1960 | 1944.4 |
dates of ephemeris: | 1950-1972 | 1950-1972 | |
grade: | definitive | indeterminate | |
reference: | Astron. J. 59, 243; 1954. | Ibid. | Ibid. |
other name(s) | STF 1196 Cc-P |