(50000) Quaoar
compiled by Wm. Robert Johnston
last updated 25 November 2008
Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):
orbital data, primary (osculating elements) [JPL]:
|
semimajor axis a: |
43.612 AU
| |
orbital period P: |
288.01 y (=105,196.3 d)
| |
eccentricity e: |
0.03703
| |
perihelion distance q: |
41.997 AU
| |
aphelion distance Q: |
45.226 AU
| |
inclination i: |
7.98500°
| |
argument of perihelion omega: |
147.87°
| |
ascending node OMEGA: |
188.8225°
| |
mean anomaly M: |
284.03°
| |
perihelion passage TP: |
2068-01-19.3
| |
Epoch: |
10 APR 2007
| |
data arc: |
1954-2006 (133 obs.)
|
orbital data, secondary:
|
semimajor axis a: |
(11,000 km separation) [I8812]
| |
semimajor axis/primary radius a/Rp: |
(18?)
| |
orbital period P: |
(~10 d?)
| |
eccentricity e: |
?
| |
other data, primary:
|
diameter: |
1260 ± 190 km [B04a]
| |
absolute magnitude H: |
2.67 ± 0.80 [JPL]
| |
rotation period: |
17.6788± 0.0004 h [O03c]
(8.840± 0.008 h) [R07a]
| |
amplitude delta M: |
0.133± 0.028 [O03c]
0.18±0.10 [R07a]
| |
color index B-V: |
0.94±0.01 [T03b]
| |
color index V-R: |
0.64±0.01 [T03b]
| |
color index B-R: |
1.58±0.01 [T03b]
| |
color index V-I: |
1.28±0.02 [F04a]
| |
slope parameter G: |
(0.15) assumed
| |
geometric albedo: |
0.092 +0.036/-0.023 (R) [B04a]
0.101 +0.039/-0.024 (B) [B04a]
| |
mass: |
?
| |
density: |
?
| |
type: |
?
|
other data, secondary:
|
diameter: |
(95 ± 24 km)
| |
diameter ratio Ds/Dp: |
(0.076 ± 0.007)
| |
component magnitude difference: |
5.6±0.2 [I8812]
| |
rotation period: |
?
|
|
--(50000) Quaoar--discovery and notes:
Primary discovered 4 June 2002 by C. A. Trujillo and M. E. Brown and Palomar Observatory, California, USA; subsequently linked to observations to 25 May 1954. Alternate designation 2002 LM60.
Companion discovered by M. E. Brown and T.-A. Suer using Hubble Space Telescope observations from 14 February 2006; reported 22 February 2007.
See more information and links at Asteroid/Comet Connection Catchall Catalog page
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Desch, S. J., Cook, J. C., Hawley, W., & Doggett, T. C. 2007, Lunar and Planetary Institute Conference Abstracts Cryovolcanism on Charon and Other Kuiper Belt Objects
- Rabinowitz, David L., Schaefer, Bradley E., & Tourtellotte, Suzanne W. 2007, Astronomical Journal The Diverse Solar Phase Curves of Distant Icy Bodies. I. Photometric Observations of 18 Trans-Neptunian Objects, 7 Centaurs, and Nereid
- Bernstein, M. P., Mastrapa, R., & Sandford, S. 2006, AGU Fall Meeting Abstracts Near IR spectra and real and imaginary indicies of refraction of ices of relevance to KBOs
- Emery, J. P., Dalle Ore, C., Cruikshank, D. P., Fernandez, Y. R., Trilling, D. E., & Stansberry, J. A. 2006, AGU Fall Meeting Abstracts Reflectances of Kuiper Belt Objects at lambda > 2.5 microns
- Moore, Marla H., Hudson, R. L., & Ferrante, R. F. 2006, AAS/Division for Planetary Sciences Meeting Abstracts IR Studies of Ammonia Hydrates: Effects of Thermal and Radiation Processing
- Bernstein, Max, Sandford, S., & Cruikshank, D. 2006, AAS/Division for Planetary Sciences Meeting Abstracts Near IR Spectra of H2O/CH4 And H2O/CO2 Ice Mixtures of Relevance to the Outer Solar System
- Cook, Jason C., Desch, S. J., Roush, T. L., Geballe, T. R., & Trujullo, C. A. 2006, AAS/Division for Planetary Sciences Meeting Abstracts Near-Infrared Spectroscopy of Charon: Possible Evidence for Cryovolcanism on Kuiper Belt Objects
- Bagnulo, S., Boehnhardt, H., Muinonen, K., Kolokolova, L., Belskaya, I., & Barucci, M. A. 2006, Astronomy and Astrophysics Exploring the surface properties of transneptunian objects and Centaurs with polarimetric FORS1/VLT observations
- Hussmann, H., Sohl, F., & Spohn, T. 2005, AGU Fall Meeting Abstracts Sub-Surface Oceans on Mid-Sized Icy Satellites and Large TNO's
- Durand-Manterola, H. J. 2005, AGU Fall Meeting Abstracts A Definition of Planet
- Rhoads, Edward 2005, Ph.D. Thesis A survey for TNOs using the APS POSS I database
- Schaefer, B. E., Rabinowitz, D., & Tourtellotte, S. 2005, Bulletin of the American Astronomical Society Nightly Observations in BVI of 25 KBOs and Centaurs Over a Whole Observing Season
- Mastrapa, R. M. E., Moore, M. H., Hudson, R. L., Ferrante, R. L., & Brown, R. H. 2005, Bulletin of the American Astronomical Society Proton Irradiation of Crystalline Water Ice: Timescales for Amorphization in the Kuiper Belt
- Trujillo, C. A., Barkume, K. M., Brown, M., Schaller, E. L., & Rabinowitz, D. L. 2005, Bulletin of the American Astronomical Society Near Infrared Spectra from Mauna Kea of the New Brightest Kuiper Belt Object
- Brown, Michael 2005, HST Proposal Direct measurement of the size of 2003 UB313
- Rhoads, E. 2005, Bulletin of the American Astronomical Society A Survey For TNOs Using the APS POSS I Database
- Leto, G., Gomis, O., & Strazzulla, G. 2005, Memorie della Societa Astronomica Italiana Supplement The reflectance spectrum of water ice: Is the 1.65 mu msp peak a good temperature probe?.
- Jewitt, David C. & Luu, Jane 2004, Nature Crystalline water ice on the Kuiper belt object (50000) Quaoar
- Stevenson, David J. 2004, Nature Planetary science: Volcanoes on Quaoar?
- Rhoads, E., Humphries, R., Woodward, C., & Larsen, J. 2004, Bulletin of the American Astronomical Society A survey for TNOs using the APS POSS I database
- Prentice, A. J. R. 2004, Bulletin of the American Astronomical Society Titan and Phoebe: Predicted Bulk Chemical Composition and Structure for a Capture Origin
- Pinilla-Alonso, N., Licandro, J., & Campins, H. 2004, Bulletin of the American Astronomical Society Mineralogical analysis of two different kind of icy surfaces in the trans-neptunian belt, TNOs (50000) Quaoar and 2002 TX<SUB>300</SUB>
- Rabinowitz, D., Tourtellotte, S., & Schaefer, B. 2004, Bulletin of the American Astronomical Society The Wavelength Dependence of TNO and Centaur Phase Curves
- Barentine, J. C., Esquerdo, G. A., & Neese, C. L. 2004, Bulletin of the American Astronomical Society The APO-PSI TNO Survey
- Brown, Michael E. & Trujillo, Chadwick A. 2004, Astronomical Journal Direct Measurement of the Size of the Large Kuiper Belt Object (50000) Quaoar
- Pinilla, N. & Licandro, J. 2004, 35th COSPAR Scientific Assembly Mineralogycal analysis of the icy surface of TNOs (50000) Quaoar and 2002 TX<SUB>300</SUB>
- de Bergh, C., Barucci, A., Doressoundiram, A., & Dotto, E. 2004, 35th COSPAR Scientific Assembly Spectroscopy of Kuiper Belt Objects and Centaurs
- Ortiz, J. L., Gutiérrez, P. J., Sota, A., Casanova, V., & Teixeira, V. R. 2003, Astronomy and Astrophysics Rotational brightness variations in Trans-Neptunian Object 50000 Quaoar
- Marchi, S., Lazzarin, M., Magrin, S., & Barbieri, C. 2003, Astronomy and Astrophysics Visible spectroscopy of the two largest known trans-Neptunian objects: Ixion and Quaoar
- Trujillo, C. A. & Brown, M. E. 2003, Earth Moon and Planets The Caltech Wide Area Sky Survey
- Hughes, David W. 2003, Astronomy and Geophysics Planets: Quaoar and the Edgeworth-Kuiper belt
- Trujillo, C. A. & Brown, M. E. 2003, Bulletin of the American Astronomical Society The Caltech survey for the brightest Kuiper belt objects
- Rabinowitz, D., Schaefer, B., & Tourtellotte, S. 2003, Bulletin of the American Astronomical Society Solar Phase Curves for Kuiper-Belt Objects
- Licandro, J., Campins, H., de Leon Cruz, J., Gil-Hutton, R., & Lara-Lopez, L. M. 2003, Bulletin of the American Astronomical Society Near infrared spectroscopy of TNOs, Centaurs and comet nuclei.
© 2007, 2008 by Wm. Robert Johnston.
Last modified 25 November 2008.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.