Asteroids with Satellites Database--Johnston's Archive

(523794) 2015 RR245

compiled by Wm. Robert Johnston
last updated 19 February 2023

--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, 2:9 resonance

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 82.9235 AU
orbital period P: 755.135 yr
(= 275813 d)
eccentricity e: 0.587366
perihelion distance q: 34.2171 AU
aphelion distance Q: 131.63 AU
inclination i: 7.525122°
argument of perihelion ω: 259.8272°
ascending node Ω: 211.83407°
mean anomaly M: 326.9455°
perihelion passage TP: 2092 Jun 26.60
Epoch: 2023 Feb 25
data arc: 2004-2022 (257 obs.)
Earth MOID: 33.2416 AU
Jupiter Tisserand invariant TJ: 6.469
Neptune Tisserand invariant TN:3.027 [*D]

orbital data, secondary:
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 4.01 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 694 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: 1500000 km [*E]

other data, primary:
diameter dp: 608 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 334 km [*E]
diameter ratio ds/dp: 0.55 ± 0.1 [*D]
component mag. difference ΔM: 1.3 ± 0.45 [F22b]
rotation period RPs: ?

-- (523794) 2015 RR245 --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 2004 Oct 15. Permanent number assigned 2018 Sep 25.

Companion discovered - by Outer Solar System Origins Survey using adaptive optics telescope observations from CFHT Telescope, Mauna Kea, Hawaii, USA. Announced 2019 Sep [N19b].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2023 by Wm. Robert Johnston.
Last modified 19 February 2023.
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