Asteroids with Satellites Database--Johnston's Archive
2015 RJ277
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:
TNO, Cubewano
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
46.992 AU
| |
orbital period P: |
322.14 yr
(= 117662 d)
| |
eccentricity e: |
0.20627
| |
perihelion distance q: |
37.299 AU
| |
aphelion distance Q: |
56.685 AU
| |
inclination i: |
5.5038°
| |
argument of perihelion ω: |
69.67°
| |
ascending node Ω: |
350.0433°
| |
mean anomaly M: |
332.354°
| |
perihelion passage TP: |
2046 Mar 28
| |
Epoch: |
2021 Jul 01
| |
data arc: |
2014-2017
(43 obs.)
| |
Earth MOID: |
36.3154 AU
| |
Jupiter Tisserand invariant TJ: |
5.965
|
| Neptune Tisserand invariant TN: | 3.075 [*D] |
orbital data, secondary:
|
semimajor axis as: |
1100
km
(separation)
[F21a]
| |
separation/primary radius as/rp: | 15.4 [*E] | |
separation/Hill radius as/rH: | 0.0024 [*E] | |
orbital period Ps: |
8.1
d [*E]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
7.3
[MPC]
6.59 [P20g]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
153
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: |
450000 km [*E]
|
other data, primary:
|
diameter dp: |
143
km [*E]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
53
km [*E]
| |
diameter ratio ds/dp: |
0.37
[*D]
| |
component mag. difference ΔM: |
2.17
[P20g]
| |
rotation period RPs: |
?
| |
|
|
--
2015 RJ277
--discovery and notes:
Primary discovered
2015 Sep 09
from
Mauna Kea Observatory, Hawaii, USA
by
Outer Solar System Origins Survey.
Linked to prediscovery observations from 2014 Nov 21.
Companion discovered
2019 Oct 05
by A. H. Parker, et al., and the Solar System Origins Legacy Survey
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2021 Mar 31 [F21a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2021
by Wm. Robert Johnston.
Last modified
9 October 2021.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.