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Asteroids with Satellites Database--Johnston's Archive

(2047) Smetana

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:1.872013158 AU
orbital periodP:2.561365453 yr
(= 935.5387318 d)
eccentricitye:0.003427671
perihelion distanceq:1.86559651 AU
aphelion distanceQ:1.878429803 AU
inclinationi:25.276498°
argument of perihelionω:304.5334°
ascending nodeΩ:36.628790°
mean anomalyM:277.8747°
perihelion passageTP:2014 Dec 22.420
Epoch:2014 May 23
data arc:1971-2013(748 obs.)
Earth MOID:0.868774 AU
Jupiter Tisserand invariantTJ:3.864

orbital data, secondary:

semimajor axisas:6.3 km[*E]
separation/primary radiusas/rp:4.2 [*E]
separation/Hill radiusas/rH:0.014 [*E]
orbital periodPs:0.9346± 0.0008d [W13c]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:13.9[MPC]
14.25 ± 0.05 [W13c]
slope parameterG:0.30 [W13c]
effective diameterdE:3.07± 0.15 km [W13c]
geometric albedo:0.37± 0.04[W13c]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:?
densityρ:(1.6 g/cm3) [*A]
Hill radiusrH:440 km [*E]

other data, primary:

diameterdp:3± 0.15 km [*D]
rotation periodRPp:2.4970± 0.0003h [W13c]
amplitude in mag., rotationalΔM:0.12± 0.01 [W13c]
amplitude in mag., mutual eventsΔM:0.05 [W13c]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:0.63± 0.07km [*D]
diameter ratiods/dp:>0.21± 0.02 [W13c]
component mag. differenceΔM:<3.4± 0.2 [*D]
rotation periodRPs:?

--(2047) Smetana --discovery and notes:

Primary discovered1971 Oct 26from Bergedorf, Germanyby L. Kohoutek.Alternate designation(s):1971 UA1.Permanent number assigned -.

Named - for Bedrich Smetana (1824-1884) [MPC4786].

Companion discovered2012 Oct 31usinglightcurve observations.Announced2012 Mar .

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


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