Asteroids with Satellites Database--Johnston's Archive
(317)
Roxane
and Olympias
compiled by Wm. Robert Johnston
last updated
9 October 2021
--Orbital and physical data--
(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)
dynamical type, primary:
main belt asteroid
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
2.286846411 AU
| |
orbital period P: |
3.4583082329 yr
(= 1263.1470821 d)
| |
eccentricity e: |
0.085142101
| |
perihelion distance q: |
2.092139502 AU
| |
aphelion distance Q: |
2.48155332 AU
| |
inclination i: |
1.76599724°
| |
argument of perihelion ω: |
187.051839°
| |
ascending node Ω: |
151.34187°
| |
mean anomaly M: |
191.14032°
| |
perihelion passage TP: |
2023 Feb 13.485032
| |
Epoch: |
2021 Jul 01
| |
data arc: |
1891-2021
(3826 obs.)
| |
Earth MOID: |
1.08204 AU
| |
Jupiter Tisserand invariant TJ: |
3.596
|
orbital data, secondary:
|
semimajor axis as: |
245
± 3 km
[D21a]
| |
separation/primary radius as/rp: | 24.7 [*E] | |
separation/Hill radius as/rH: | 0.068 [*E] | |
orbital period Ps: |
11.944
± 0.0005
d [D21a]
| |
eccentricity es: |
0.074
± 0.012
[D21a]
| |
inclination is: | 161.1° ± 0.7° [D21a] | |
ascending node Ωs: | 186.9° ± 0.7° [D21a] | |
argument of pericenter ωs: | 315.3° ± 6.5° [D21a] | |
mean anomaly M: | 183° [D21a] | |
pericenter passage TP: | 2016 Oct 26.97± 0.23 [D21a] | |
Epoch: | 2017 Jan 1.0 | |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
9.8
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
20.56
km [*D]
| |
geometric albedo: |
0.525
± 0.079
[M11b]
| |
color index U-B: |
0.238
[T95a]
| |
color index B-V: |
0.694
[T95a]
| |
taxonomic type: |
Xe (SMASSII) [JPL]
E (Tholen) [JPL]
| |
mass m: |
8.17x1015
± 3x1014
kg [S21a]
| |
density ρ: |
2.16
± 0.18
g/cm3[D21a]
| |
Hill radius rH: |
3600 km [*E]
|
other data, primary:
|
diameter dp: |
19.86
± 0.12
km [M11b]
| |
dimensions : | 29.0 x 17.0 x 14.4km [S21a] | |
axial ratios a/b, b/c: | 1.71, 1.18 [S21a] | |
volume : | 3710± 280[D21a] | |
rotation period RPp: |
8.169
± 0
h [H92a]
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
5.2
± 0.6
km [D21a]
| |
dimensions : | 7.2 x 5.0 x 4.0km [D21a] | |
axial ratios a/b, b/c: | 1.44;1.2 [D21a] | |
diameter ratio ds/dp: |
0.271
[*D]
| |
component mag. difference ΔM: |
2.84
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(317) Roxane and Olympias
--discovery and notes:
Primary discovered
1891 Sep 11
from
Nice, France
by
A. Charlois.
Permanent number assigned 1891.
Named 1893 for Roxana (~343 BC-~310 BC) [AN03155].
Companion discovered
2009 Nov 24
by W. J. Merline, P. M. Tamblyn, J. D. Drummond, J. C. Christou, A. R. Conrad, B. Carry, C. R. Chapman, C. Dumas, D. D. Durda, W. M. Owen, and B. L. Enke
using
adaptive optics telescope
observations from Gemini North Telescope, Mauna Kea, Hawaii, USA.
Announced
2009 Oct 26 [M09b].
Provisional designation S/2009 (317) 1.
Permanent designation I Olympias, assigned 2020 Nov 14; named for Olympias (375 BC-316 BC) [MPEC2020V139].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Jacobson, Seth A., Scheeres, Daniel J., & McMahon, Jay 2014, The Astrophysical Journal Formation of the Wide Asynchronous Binary Asteroid Population
- Polishook, D., Brosch, N., & Prialnik, D. 2011, Icarus Rotation periods of binary asteroids with large separations - Confronting the Escaping Ejecta Binaries model with observations
- Merline, W. J., Tamblyn, P. M., Drummond, J. D., Christou, J. C., Conrad, A. R., Keck Observatory, W. M., Carry, B., Chapman, C. R., Dumas, C., Durda, D. D., Owen, W. M., & Enke, B. L. 2009, International Astronomical Union Circular S/2009 (317) 1
- Merline, W. J., Tamblyn, P. M., Drummond, J. D., Christou, J. C., Conrad, A. R., Keck Observatory, W. M., Carry, B., Chapman, C. R., Dumas, C., Durda, D. D., Owen, W. M., & Enke, B. L. 2009, Central Bureau Electronic Telegrams S/2009 (317) 1
- Fornasier, S., Migliorini, A., Dotto, E., & Barucci, M. A. 2008, Icarus Visible and near infrared spectroscopic investigation of E-type asteroids, including 2867 Steins, a target of the Rosetta mission
- Bus, S. & Binzel, R. P. 2004, NASA Planetary Data System 317 Roxane CCD Spectrum
- Millosevich, Elia 1904, Astronomische Nachrichten Pianeta (317) Roxane
- Bidschof, Friedrich 1893, Astronomische Nachrichten Elemente des Planeten (317) Roxane.
©
2009-2020, 2021
by Wm. Robert Johnston.
Last modified
9 October 2021.
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