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Asteroids with Satellites Database--Johnston's Archive

(18303) 1980 PU

compiled by Wm. Robert Johnston
last updated20 October 2019

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis 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 axisa:2.1914802867 AU
orbital periodP:3.2441905321 yr
(= 1184.9629714 d)
eccentricitye:0.205673976
perihelion distanceq:1.740749822 AU
aphelion distanceQ:2.6422107512 AU
inclinationi:4.2626379°
argument of perihelionω:56.924488°
ascending nodeΩ:222.801232°
mean anomalyM:0.904824°
perihelion passageTP:2019 Apr 24.021714
Epoch:2019 Apr 27
data arc:1980-2019(1701 obs.)
Earth MOID:0.728411 AU
Jupiter Tisserand invariantTJ:3.641

orbital data, secondary:

semimajor axisas:6.1 km[*E]
separation/primary radiusas/rp:2.8 [*E]
separation/Hill radiusas/rH:0.010 [*E]
orbital periodPs:0.51125± 0.00012d [B19d]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:14.4[MPC]
slope parameterG:(0.15) [*A]
effective diameterdE:4.38 km [*E]
geometric albedo:(0.16) [*A]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:?
densityρ:(1.6 g/cm3) [*A]
Hill radiusrH:580 km [*E]

other data, primary:

diameterdp:4.3 km [*E]
rotation periodRPp:2.72627± 0.0001h [B19d]
amplitude in mag., rotationalΔM:0.1 [B19d]
amplitude in mag., mutual eventsΔM:0.085 ±0.035 [B19d]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:1km [*E]
diameter ratiods/dp:0.24± 0.03 [B19d]
component mag. differenceΔM:3.1± 0.3 [*D]
rotation periodRPs:?

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

Primary discovered1980 Aug 06from Klet, Czech Republicby 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 discovered2019 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. Aznarusinglightcurve 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.Announced2019 Oct 09 [B19d].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

©2019by Wm. Robert Johnston.
Last modified20 October 2019.
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