Contents.
planet: 7 -Uranus
satellites: U16-Caliban: 12,
U17-Sycorax: 27
total number: 39
type: absolute
dates: 1984-1998
observatory: 675 - Palomar Mountain
1001 - The University of Hawaii - ???
950 - La Palma - 950
709 - Cloudcroft (???)
696 - Whipple Observatory (Mt. Hopkins) - 696
568 - Mauna Kea - 568
1002 - Anglo-Australian Observatory - ???
807 - Cerro Tololo Interamerican Observatory - 807
Reference.
6764 = IAU Circular No. 6764, 1997, October 31
1997IAUC_6764____1G
6771 = IAU Circular No. 6771, 1997, November 14
1997IAUC_6771____3F
6780 = IAU Circular No. 6780, 1997, November 29
1997IAUC_6780____1L
6833 = IAU Circular No. 6833, 1998, March 7
1998IAUC_6833____1M
6869 = IAU Circular No. 6869, 1998, April 7
1998IAUC_6869____1S
6870 = IAU Circular No. 6870, 1998, April 7
1998IAUC_6870____1G
Informations.
relative to: absolute
reference frame: astrometric
centre of frame: geocentre
epoch of equinox: J2000
time scale: UTC
reduction: no information
coordinates: absolute
diff. refraction: no information
receptor: 1 - CCD
2 - photographic
3 - unknown
telescope:
1 - COSMIC CCD camera on the Hale 5-m telescope at Palomar
2 - The University of Hawaii's 2.2-m reflector
3 - 2.5-m Isaac Newton Telescope, La Palma
4 - Cloudcroft. 0.6-m f/7 Ritchey-Chretien
5 - Mt. Hopkins. 1.2-m f/8 reflector
6 - Mauna Kea. Canada-France-Hawaii Telescope (photographic)
7 - Anglo-Australian Observatory. 4-m reflector, CCD
8 - Cerro Tololo Interamerican Observatory. 4-m reflector, CCD
observers:
1 - B.J.Gladman, P.D.Nicholson, J.A.Burns, J.J.Kavelaars
2 - P.D.Nicholson, B.J.Gladman, J.A.Burns, J.J.Kavelaars
3 - W.Offutt
4 - D.J.Tholen (assisted by C.Herrick and R.J.Whiteley)
5 - A.Fitzsimmons, M.E.Fletcher, M.J.Irwin, assisted by P.Sorenson, M.Asif
6 - C.W.Hergenrother
7 - S.Lilly, M.-C.Hainaut, O.Le Fevre, M.Dussert. Measurer B. Gladman
8 - D.P.Cruikshank. Measurer B. J. Gladman
9 - M.J.Holman, W.R.Brown
10 - R.M.Smith, J.B.Jones, D.Windridge. Measurer B. Gladman
11 - P.Hall, D.Graham. Measurer J.J.Kavelaars
data included in standard data file: no
Comments.
DISCOVERY OF SATELLITES OF URANUS
B. J. Gladman, Canadian Institute for Theoretical
Astrophysics; P. D. Nicholson and J. A. Burns, Cornell University;
and J. J. Kavelaars, McMaster University, report the discovery of
two probable distant satellites of Uranus on CCD frames obtained
with the COSMIC camera on the Hale 5-m telescope at Palomar. The
objects were detected by Gladman in early October on a set of
twelve 360-s frames obtained on Sept. 6 and 7.
Reference: IAU Circular No. 6764, 1997 October 31.
evaluation: The values of O-C were calculated by N.Emelianov
with the keplerian orbit ephemerides according
to the elements published in
IAU Circular No. 6870, 1998 April 7
IAU Circular No. 6869, 1998 April 7
Orbits of satellites of Uranus
Uranus XVI = S/1997 U 1 = Caliban
Osculating orbit: Epoch = 1998 July 6.0 TT
Semi-major axes: 0.047921 AU
Mean motion: 0.621291 degree/day
Eccentricity: 0.082347
Inclination: 139.6813 degree
Moment at perihelia: 1998 Apr. 19.6463 TT
Perihelia from ascending node: 339.4621 degree
Longitude of ascending node: 174.9928 degree
Distance at perihelia: 0.043975 AU
Period: 579 days
Reference: IAU Circular No. 6870, 1998 April 7
Uranus XVII = S/1997 U 2 = Sycorax
Osculating orbit: Epoch = 1998 July 6.0 TT
Semi-major axes: 0.081643 AU
Mean motion: 0.279383 degree/day
Eccentricity: 0.509386
Inclination: 152.6686 degree
Moment at perihelia: 1997 June 16.0390 TT
Perihelia from ascending node: 18.0055 degree
Longitude of ascending node: 255.8085 degree
Distance at perihelia: 0.040055 AU
Period: 1289 days
Reference: IAU Circular No. 6869, 1998 April 7
Format.
1. Year of the moment of observation
2. Month of the moment of observation
3. Day of the moment of observation with decimals
4. Number of satellite : 16 for Caliban, 17 for Sycorax
5. Hour of right ascension (alpha, h)
6. Minute of right ascension (alpha, m)
7. Second of right ascension (alpha, s)
8. Degree of declination (delta, deg)
9. Minute of declination (delta, ' )
10. Second of declination (delta, '' )
11. O-C(alpha) for alpha, arcsec
12. O-C(delta) for delta, arcsec
13. N reference
14. N observer
15. N observatory
16. N telescope
17. N receptor
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N N Observer
Year sat J2000 O-C N Observatory
Month R.A. Decl. alpha delta N Telescope
Day (UT) h m s deg ' '' '' '' N reference N Recept
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