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Asteroids with Satellites Database--Johnston's Archive

(4440) Tchantches

compiled by Wm. Robert Johnston
last updated21 September 2014

--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, Hungaria


orbital data, primary (osculating elements)[JPL]:

semimajor axisa:1.921293145 AU
orbital periodP:2.663168541 yr
(= 972.7223096 d)
eccentricitye:0.077206165
perihelion distanceq:1.77295747 AU
aphelion distanceQ:2.069628819 AU
inclinationi:21.3515413°
argument of perihelionω:224.816853°
ascending nodeΩ:283.354620°
mean anomalyM:336.461136°
perihelion passageTP:2014 Jul 25.6021
Epoch:2014 May 23
data arc:1984-2014(840 obs.)
Earth MOID:0.815616 AU
Jupiter Tisserand invariantTJ:3.837

orbital data, secondary:

semimajor axisas:3.8 km[*E]
separation/primary radiusas/rp:3.7 [*E]
separation/Hill radiusas/rH:0.014 [*E]
orbital periodPs:0.7788± 0.002d [W13d]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:13.6[MPC]
slope parameterG:(0.15) [*A]
effective diameterdE:2.09± 0.59 km [M11b]
geometric albedo:1± 0.063[M11b]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:?
densityρ:(1.6 g/cm3) [*A]
Hill radiusrH:280 km [*E]

other data, primary:

diameterdp:2.03± 0.57 km [*D]
axial ratiosa/b, b/c:1.3, ? [W13d]
rotation periodRPp:2.78836± 0.00004h [W13d]
amplitude in mag., rotationalΔM:0.29 [W13d]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:0.51± 0.16km [*D]
diameter ratiods/dp:>0.25± 0.03 [W13d]
component mag. differenceΔM:<3.0± 0.3 [*D]
rotation periodRPs:?

--(4440) Tchantches --discovery and notes:

Primary discovered1984 Dec 23from Haute Provence, Franceby F. Dossin.Alternate designation(s):1984 YV.Permanent number assigned 1990 Apr 10.

Named 1998 Dec 08 for the folklore character Tchantches [MPC33385].

Companion discovered2005 Sep 27 by B. D. Warnerusinglightcurve observations from Palmer Divide Observatory, Colorado Springs, Colorado, USA.Announced2013 Jul [W13d].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


©2013, 2014by Wm. Robert Johnston.
Last modified21 September 2014.
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