Asteroids with Satellites Database--Johnston's Archive

(18303) 1980 PU

compiled by Wm. Robert Johnston
last updated 20 October 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: main belt asteroid

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.1914802867 AU
orbital period P: 3.2441905321 yr
(= 1184.9629714 d)
eccentricity e: 0.205673976
perihelion distance q: 1.740749822 AU
aphelion distance Q: 2.6422107512 AU
inclination i: 4.2626379°
argument of perihelion ω: 56.924488°
ascending node Ω: 222.801232°
mean anomaly M: 0.904824°
perihelion passage TP: 2019 Apr 24.021714
Epoch: 2019 Apr 27
data arc: 1980-2019 (1701 obs.)
Earth MOID: 0.728411 AU
Jupiter Tisserand invariant TJ: 3.641

orbital data, secondary:
semimajor axis as: 6.1 km [*E]
separation/primary radius as/rp:2.8 [*E]
separation/Hill radius as/rH:0.010 [*E]
orbital period Ps: 0.51125 ± 0.00012 d [B19d]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.4 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.38 km [*E]
geometric albedo: (0.16 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 580 km [*E]

other data, primary:
diameter dp: 4.3 km [*E]
rotation period RPp: 2.72627 ± 0.0001 h [B19d]
amplitude in mag., rotational ΔM: 0.1 [B19d]
amplitude in mag., mutual events ΔM:0.085 ±0.035 [B19d]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 1 km [*E]
diameter ratio ds/dp: 0.24 ± 0.03 [B19d]
component mag. difference ΔM: 3.1 ± 0.3 [*D]
rotation period RPs: ?

-- (18303) 1980 PU --discovery and notes:

Primary discovered 1980 Aug 06 from Klet, Czech Republic by Z. Vavrova. Alternate designation(s): 1983 JC1, 1992 CO6, 1999 HK8. Linked to prediscovery observations from 1980 Aug 04. Permanent number assigned 2000 Nov 11.

Companion discovered 2019 Aug 10 by V. Benishek, P. Pravec, P. Kusnirak, R. Durkee, D. Pray, V. Chiorny, O. Mikhalchenko, M. Husarik, M. Pikler, J. Oey, P. Bacci, M. Maestripieri, A. Aznar using lightcurve observations from Sopot Observatory, Serbia; Shed of Science South Observatory; Sugarloaf Mountain Observatory; Chuguev station, Kharkiv Observatory, Ukraine; Skalnate Pleso Observatory; Blue Mountains Observatory; San Marcello Pistoiese Observatory; Isaac Aznar Observatory. Announced 2019 Oct 09 [B19d].

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--Links to ADS abstracts:

© 2019 by Wm. Robert Johnston.
Last modified 20 October 2019.
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