Asteroids with Satellites Database--Johnston's Archive

(45) Eugenia, Petit-Prince, and S/2004 (45) 1

compiled by Wm. Robert Johnston
last updated 27 May 2014
under construction--testing upgrades!

--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: 2.720342369 AU
orbital period P: 4.486870662 yr (= 1638.8295090 d)
eccentricity e: 0.083185113
perihelion distance q: 2.49405038 AU
aphelion distance Q: 2.946634357 AU
inclination i: 6.6033570°
argument of perihelion ω: 88.689234°
ascending node Ω: 147.681770°
mean anomaly M: 2.460259°
perihelion passage TP: 2014 May 11.8001
Epoch: 2014 May 23
data arc: 1866-2014 (2099 obs.)
Earth MOID: 1.49355 AU
Jupiter Tisserand invariant TJ: 3.344


orbital data, Petit-Prince:
binary dynamical type:L [P07f]
semimajor axis as: 1165 ± 0.1 km [M10a]
separation/primary radius as/rp:11 [*D]
separation/Hill radius as/rH:0.032 [*D]
orbital period Ps: 4.716 ± 0.0007 d [M10a]
eccentricity es: 0.005 ± 0.001 [M10a]
inclination is:8.0°± 0.1 [*MAb]
normalized ang. mom. αL: 0.84 [P07f]


orbital data, S/2004 (45) 1:
binary dynamical type:L [*VO]
semimajor axis as: 611.1 ± 0.2 km [M10a]
separation/primary radius as/rp:5.9 [*D]
separation/Hill radius as/rH:0.017 [*D]
orbital period Ps: 1.793 ± 0.0008 d [M10a]
eccentricity es: 0.071 ± 0.002 [M10a]
normalized ang. mom. αL: 0.84 [*VO]

other data, system (combined):
absolute mag. H: 7.46 [MPC]
slope parameter G: 0.07 [JPL]
effective diameter dE: 206.14 ± 6.22 km [M11b]
geometric albedo: 0.046 ± 0.006 [M11b]
color index U-B: 0.274 [T95a]
color index B-V: 0.676 [T95a]
taxonomic type: C (SMASSII) [JPL]
FC (Tholen) [JPL]
mass m: 5.69x1018 ± 1.2x1017 kg [M08d]
density ρ: 1.1 ± 0.1 g/cm3 [M08d]
Hill radius rH: 37000 km [*D]

other data, primary:
diameter dp: 206.14 ± 6.22 km [M11b]
axial ratios a/b, b/c:1.36;1.40 [*SBb]
rotation period RPp: 5.699160 ± 0.000005 h [D95a]
amplitude in mag., rotational ΔM: ?
pole direction : 289±3° ; 27±6° ; [D95a]


other data, Petit-Prince:
diameter ds: 7 ± 2 km [M10a]
diameter ratio ds/dp: 0.034 ± 0.01 [*D]
component mag. difference ΔM: 6.14 ± 0.10 [*M99a]
rotation period RPs: ?


other data, S/2004 (45) 1:
diameter ds: 5 ± 1 km [M10a]
diameter ratio ds/dp: 0.024 ± 0.005 [*D]
component mag. difference ΔM: 8 [*D]
rotation period RPs: ?

-- (45) Eugenia, Petit-Prince, and S/2004 (45) 1 --discovery and notes:

Primary discovered 1857 Jun 27 from Paris, France by H. Goldschmidt. Alternate designation(s): 1941 BN. Permanent number assigned 1857.

Named 1857 for Eugenia di Montijo (1826-1920).

Second component discovered 1998 Nov 01 by W. J. Merline, L. M. Close, C. Dumas, C. R. Chapman, F. Roddier, F. Menard, D. C. Slater, G. Duvert, C. Shelton, and T. Morgan using AOT observations from CFHT Telescope, Mauna Kea, Hawaii, USA. Announced 1999 Mar 20 [I7129]. Provisional designation S/1998 (45) 1. Permanent designation I Petit-Prince, assigned 2000 Oct 03; named for Prince Imperial Napoleon (1856-1879) [I7503].

Third component discovered 2004 Feb 14 by F. Marchis, M. Baek, P. Descamps, J. Berthier, D. Hestroffer, and F. Vachier using AOT observations from Very Large Telescope, ESO, Cerro Paranal, Chile. Announced 2007 Mar 07 [I8817]. Provisional designation S/2004 (45) 1. Proposed name: "Princesse".

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--Links to ADS abstracts:


© 2001-2012, 2014 by Wm. Robert Johnston.
Last modified 27 May 2014.
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