Asteroids with Satellites Database--Johnston's Archive
2003 UN284
compiled by Wm. Robert Johnston
last updated
31 January 2015
--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:
TNO, Cubewano
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
42.79318508 AU
| |
orbital period P: |
279.9433274 yr
(= 102249.3004 d)
| |
eccentricity e: |
0.006737713
| |
perihelion distance q: |
42.50485688 AU
| |
aphelion distance Q: |
43.08151329 AU
| |
inclination i: |
3.071819987°
| |
argument of perihelion ω: |
27.39667061°
| |
ascending node Ω: |
36.03442653°
| |
mean anomaly M: |
4.36711406°
| |
perihelion passage TP: |
2010 Dec 29
| |
Epoch: |
2014 May 23
| |
data arc: |
2003-2008
(31 obs.)
| |
Earth MOID: |
41.5173 AU
| |
Jupiter Tisserand invariant TJ: |
5.849
|
| Neptune Tisserand invariant TN: | 3.085 [*D] |
orbital data, secondary:
|
semimajor axis as: |
54000
± 2000 km
[G14a]
| |
separation/primary radius as/rp: | 870 [*D] | |
separation/Hill radius as/rH: | 0.14 [*D] | |
orbital period Ps: |
3180
± 90
d [G14a]
| |
eccentricity es: |
0.38
± 0.02
[G14a]
| |
inclination is: | 32.6° ± 0.7° [G14a] | |
ascending node Ωs: | 50° ± 1° [G14a] | |
argument of pericenter ωs: | 270° ± 4° [G14a] | |
mean anomaly M: | 202° ± 3° [G14a] | |
Epoch: | 2003 Nov 20.3 | |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
7.5
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
149
km [*D]
| |
geometric albedo: |
0.09
± 0.03/0.01
[P11a]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
1.3x1018
± 1x1017
kg [G14a]
| |
density ρ: |
(1
g/cm3) [*A]
| |
Hill radius rH: |
380000 km [*D]
|
other data, primary:
|
diameter dp: |
124
± 6/10
km [P11a]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
83
± 5/7
km [*D]
| |
diameter ratio ds/dp: |
0.667
± 0.018
[P11a]
| |
component mag. difference ΔM: |
0.88
± 0.06
[P11a]
| |
rotation period RPs: |
?
| |
|
|
--
2003 UN284
--discovery and notes:
Primary discovered
2003 Oct 24
from
Kitt Peak Observatory, Arizona, USA
by
M. W. Buie.
Companion discovered
2003 Oct 24
by R. L. Millis, K. B. Clancy, Deep Ecliptic Survey team
using
imaging
observations from Mayall Telescope, Kitt Peak, Arizona, USA.
Announced
2003 Dec 05 [M03k].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Kern, S. D., Schechter, P. L., Pittichova, J., Meech, K. J., Wasserman, L. H., Trilling, D. E., Buie, M. W., Millis, R. L., Chiang, E. I., Hylton, S. N., Clancy, K. B., Lovering, J. R., & Marsden, B. G. 2004, Minor Planet Electronic Circulars 2002 VB131, 2003 UN284
- Wasserman, L. H., Trilling, D. E., Chiang, E. I., Lovering, J. R., Clancy, K. B., Kern, S. D., & Marsden, B. G. 2003, Minor Planet Circulars 2003 UN284
- Millis, R. L. & Clancy, K. B. 2003, International Astronomical Union Circular 2003 UN_284
©
2003-2014, 2015
by Wm. Robert Johnston.
Last modified
31 January 2015.
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