(283) Emma and S/2003 (283) 1
compiled by Wm. Robert Johnston
last updated 1 September 2005
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: |
3.0425045 AU
| |
orbital period P: |
5.3071 y (=1938.5 d)
| |
eccentricity e: |
0.1527581
| |
perihelion distance q: |
2.5777373 AU
| |
aphelion distance Q: |
3.50727171 AU
| |
inclination i: |
7.99196°
| |
argument of perihelion omega: |
53.97995°
| |
ascending node OMEGA: |
304.50431°
| |
mean anomaly M: |
105.05179°
| |
perihelion passage TP: |
2004-01-30.3520315
| |
Epoch: |
18 AUG 2005
| |
data arc: |
1889-1998 (206 obs.)
|
orbital data, secondary:
|
semimajor axis a: |
596 ± 3 km [MAh]
| |
semimajor axis/primary radius a/Rp: |
(8.1)
| |
orbital period P: |
3.36 ± 0.001 d [MAh]
| |
eccentricity e: |
0.11 ± 0.01 [MAh]
| |
inclinationi: |
0° [MAh]
| |
other data, primary:
|
diameter: |
148.1 ± 4.6 km [IR]
| |
absolute magnitude H: |
8.72 [JPL]
| |
rotation period: |
6.888 ± 0.007 h [S78a]
| |
amplitude delta M: |
0.31 [H03a]
| |
color index U-B: |
0.274 ± 0.030 [SBa]
| |
color index B-V: |
0.628 ± 0.020 [SBa]
| |
color index V-R: |
?
| |
color index R-I: |
?
| |
slope parameter G: |
(0.15) [a]
| |
geometric albedo: |
0.026 ± 0.002 [IR]
| |
mass: |
1.48x1018 kg [MAh]
| |
density: |
(0.87 ± 0.02) g/cm3 [MAh]
| |
type: |
P [H03a]
|
other data, secondary:
|
diameter: |
12 km [I8165]
| |
diameter ratio Ds/Dp: |
(0.08)
| |
component magnitude difference: |
5.5 [I8165]
| |
rotation period: |
?
|
|
--(283) Emma--discovery and notes:
Primary discovered 8 Feb 1889 by A. Charlois from Nice, France. Additional designations 1980 FJ12.
Secondary discovered 14 July 2003 by W. J. Merline, C. Dumas, N. Siegler, L. M. Close, C. R. Chapman, P. M. Tamblyn, D. Terrell, A. Conrad, F. Menard, and G. Duvert using the Keck II adaptive optics telescope at Mauna Kea, Hawaii. Comfirming observations were obtained 15-16 July 2003 from the ESO Very Large Telescope.
See more information and links at Asteroid/Comet Connection Catchall Catalog page
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Merline, W. J., Dumas, C., Siegler, N., Close, L. M., Chapman, C. R., Tamblyn, P. M., Terrell, D., Conrad, A., Menard, F., & Duvert, G. 2003, International Astronomical Union Circular S/2003 (283) 1
- Stanzel, R. 1978, Astronomy and Astrophysics Supplement Series Lightcurves and Rotation Period of Minor Planet 283 Emma
- Blondel, Henri 1917, Journal des Observateurs Eléments et éphéméride de (283) Emma
© 2003-2004, 2005 by Wm. Robert Johnston.
Last modified 1 September 2005.
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