Asteroids with Satellites Database--Johnston's Archive
2015 RP280
compiled by Wm. Robert Johnston
last updated
15 December 2019
--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: |
45.418 AU
| |
orbital period P: |
306.08 yr
(= 111801 d)
| |
eccentricity e: |
0.0965
| |
perihelion distance q: |
41.035 AU
| |
aphelion distance Q: |
49.801 AU
| |
inclination i: |
3.4909°
| |
argument of perihelion ω: |
44.369°
| |
ascending node Ω: |
232.398°
| |
mean anomaly M: |
83.61°
| |
perihelion passage TP: |
1948 Mar 25
| |
Epoch: |
2019 Apr 27
| |
data arc: |
2015-2017
(34 obs.)
| |
Earth MOID: |
40.0192 AU
| |
Jupiter Tisserand invariant TJ: |
5.985
|
| Neptune Tisserand invariant TN: | 3.10405396085745 [*D] |
orbital data, secondary:
|
semimajor axis as: |
5080
± 90 km
(separation)
[G19c]
| |
separation/primary radius as/rp: | 80 [*E] | |
separation/Hill radius as/rH: | 0.012 [*E] | |
orbital period Ps: |
86
d [*E]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
7.3
[MPC]
7.7 ± 0.5 [G19c]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
154
km [*E]
| |
geometric albedo: |
(0.09
) [*A]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1
g/cm3) [*A]
| |
Hill radius rH: |
420000 km [*E]
|
other data, primary:
|
diameter dp: |
123
km [*E]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
93
km [*E]
| |
diameter ratio ds/dp: |
0.76
[*D]
| |
component mag. difference ΔM: |
0.6
[G19c]
| |
rotation period RPs: |
?
| |
|
|
--
2015 RP280
--discovery and notes:
Primary discovered
2015 Sep 09
from
Mauna Kea Observatory, Hawaii, USA
by
Solar System Origins Legacy Survey (A. H. Parker et al.).
Linked to prediscovery observations from 2015 Jun 23.
Companion discovered
2019 Oct 06
by Solar System Origins Legacy Survey (A. H. Parker et al.)
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2019 Nov 05 [G19c].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2019
by Wm. Robert Johnston.
Last modified
15 December 2019.
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