Asteroids with Satellites Database--Johnston's Archive
(488453) 1994 XD
compiled by Wm. Robert Johnston
last updated
14 May 2017
--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:
NEA, Apollo
(PHA)
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
2.347124733 AU
| |
orbital period P: |
3.595940168 yr
(= 1313.4171460 d)
| |
eccentricity e: |
0.733373708
| |
perihelion distance q: |
0.625805165 AU
| |
aphelion distance Q: |
4.068444300 AU
| |
inclination i: |
4.312022°
| |
argument of perihelion ω: |
249.295287°
| |
ascending node Ω: |
96.257008°
| |
mean anomaly M: |
160.4340578°
| |
perihelion passage TP: |
2012 Oct 14.675438
| |
Epoch: |
2014 May 23
| |
data arc: |
1994-2013
(294 obs.)
| |
Earth MOID: |
0.0200722 AU
| |
Jupiter Tisserand invariant TJ: |
3.127
|
orbital data, secondary:
|
semimajor axis as: |
0.6
± 0.3 km
(separation)
[B05a]
| |
separation/primary radius as/rp: | 2.0 [*E] | |
separation/Hill radius as/rH: | 0.020 [*E] | |
orbital period Ps: |
0.749
± 0.00025
d [W13c]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
19.1
[MPC]
19.11 [JPL]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
0.62
km [*D]
| |
geometric albedo: |
0.1
[*E]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
29 km [*E]
|
other data, primary:
|
diameter dp: |
0.6
± 0.15
km [B05a]
| |
rotation period RPp: |
2.736
± 0.001
h [W13c]
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>0.15
km [B05a]
| |
diameter ratio ds/dp: |
0.25
[*D]
| |
component mag. difference ΔM: |
3.0
[* D]
| |
rotation period RPs: |
?
| |
|
|
--
(488453) 1994 XD
--discovery and notes:
Primary discovered
1994 Dec 01
from
Steward Observatory, Kitt Peak, Arizona, USA
by
Spacewatch. Permanent number assigned 10 May 2017.
Companion discovered
2005 Jun 24
by L. A. M. Benner, M. C. Nolan, S. J. Ostro, J. D. Giorgini, J. L. Margot, and C. Magri
using
radar
observations from Arecibo Observatory, Puerto Rico.
Announced
2005 Jul 11 [B05a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Warner, Brian D. 2013, Minor Planet Bulletin Seeing Double Old and New: Observations and Lightcurve Analysis at the Palmer Divide Observatory of Six Binary Asteroids
- Benner, L. A. M. 2006, Society for Astronomical Sciences Annual Symposium Arecibo and Goldstone Radar Imaging of Near-Earth and Main-Belt Asteroids in 2005
- Benner, L. A. M., Nolan, M. C., Ostro, S. J., Giorgini, J. D., Margot, J. L., & Magri, C. 2005, International Astronomical Union Circular 1994 XD
- Trentman, R., Blythe, M., Shelly, F., Bezpalko, M., Huber, R., Manguso, L., Torres, D., Kracke, R., McCleary, M., Stange, H., Milner, A., Stuart, J., Sayer, R., Evans, J., Kommers, J., Larson, S. M., Beshore, E. C., Casey, C. M., Christensen, E. J., Garradd, G. J., Grauer, A., Hill, R. E., McNaught, R. H., Jacques, C., Pimentel, E., & Spahr, T. B. 2005, Minor Planet Electronic Circulars 1994 XD
- Nakamura, A., Gehrels, T., Scotti, J. V., & Marsden, B. G. 1994, Minor Planet Electronic Circulars 1994 XD
- Gehrels, T. & Marsden, B. G. 1994, Minor Planet Electronic Circulars 1994 XD
©
2005-2014, 2017
by Wm. Robert Johnston.
Last modified
14 May 2017.
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