Asteroids with Satellites Database--Johnston's Archive

(8116) Jeanperrin

compiled by Wm. Robert Johnston
last updated 21 September 2014

--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: 2.249749165 AU
orbital period P: 3.374499369 yr
(= 1232.535894 d)
eccentricity e: 0.158303423
perihelion distance q: 1.89360617 AU
aphelion distance Q: 2.605892159 AU
inclination i: 5.4310183°
argument of perihelion ω: 320.453725°
ascending node Ω: 49.040711°
mean anomaly M: 348.328394°
perihelion passage TP: 2014 Jul 01.96020
Epoch: 2014 May 23
data arc: 1987-2013 (1002 obs.)
Earth MOID: 0.895856 AU
Jupiter Tisserand invariant TJ: 3.606

orbital data, secondary:
binary dynamical type:A [M09a]
semimajor axis as: 13 km [*E]
separation/primary radius as/rp:5.7 [*E]
separation/Hill radius as/rH:0.019 [*E]
orbital period Ps: 1.506 ± 0.0008 d [H07a]
eccentricity es: ?
normalized ang. mom. αL: 0.99 [M09a]

other data, system (combined):
absolute mag. H: 13.7 [MPC]
13.52 ± 0.13 [H07a]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.77 ± 0.08 km [M11b]
geometric albedo: 0.186 ± 0.035 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 670 km [*E]

other data, primary:
diameter dp: 4.53 ± 0.08 km [*D]
rotation period RPp: 3.6169 ± 0.0002 h [H07a]
amplitude in mag., rotational ΔM: 0.1 [W14e]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 1.49 km [*D]
diameter ratio ds/dp: >0.33 [H07a]
component mag. difference ΔM: <2.4 [*D]
rotation period RPs: ?

-- (8116) Jeanperrin --discovery and notes:

Primary discovered 1996 Apr 17 from European Southern Observatory, La Silla, Chile by E. W. Elst. Alternate designation(s): 1996 HA15, 1987 WU3, 1990 RS11. Linked to prediscovery observations from 1987 Nov 24. Permanent number assigned 1997 Dec 14.

Named 1998 Feb 11 for Jean Perrin (1870-1942) [MPC31299].

Companion discovered 2007 Oct 04 by D. Higgins, P. Pravec, P. Kusnirak, K. Hornoch, M. Husarik, M. Pikler, G. Cervak, D. Pray, S. Gajdos, Yu. Krugly, A. Marshalkina, R. Stephens, F. Colas, W. Cooney, J. Gross, and D. Terrell using lightcurve observations from Canberra, Australia; Ondrejov Observatory, Czech Republic; Skalnate Pleso Observatory; Carbuncle Hill Observatory, Greene, Rhode Island; Modra Observatory, Slovakia; Kharkiv National University, Ukraine; Ulugh Beg Astronomical Institute, Uzbekistan; Goat Mountain Astronomical Research Station, Yucca Valley, California, USA; Pic du Midi Observatory; Sonoita Research Observatory, Sonoita, Arizona, USA. Announced 2007 Nov 09 [H07a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2007-2008, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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