Asteroids with Satellites Database--Johnston's Archive

(809) Lundia

compiled by Wm. Robert Johnston
last updated 26 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: 2.282385746 AU
orbital period P: 3.448194636 yr (= 1259.4530910 d)
eccentricity e: 0.193127550
perihelion distance q: 1.84159418 AU
aphelion distance Q: 2.723177314 AU
inclination i: 7.1490892°
argument of perihelion ω: 196.278428°
ascending node Ω: 154.584982°
mean anomaly M: 208.041873°
perihelion passage TP: 2015 Nov 05.62259
Epoch: 2014 May 23
data arc: 1915-2014 (1643 obs.)
Earth MOID: 0.835186 AU
Jupiter Tisserand invariant TJ: 3.569


orbital data, secondary:
binary dynamical type:B [P07f]
semimajor axis as: 15.8 km [K09a]
separation/primary radius as/rp:4.6 [*D]
separation/Hill radius as/rH:0.013 [*D]
orbital period Ps: 0.6424 ± 0.00004 d [K09a]
eccentricity es: ?
normalized ang. mom. αL: 1.26 [P07f]

other data, system (combined):
absolute mag. H: 12.1 [MPC]
slope parameter G: 0.15 [*A]
effective diameter dE: 9.1 ± 3.1 km [K09a]
geometric albedo: 0.4 [K09a]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: 4.86x1014 kg [*D]
density ρ: 1.67 ± 0.04 g/cm3 [K09a]
Hill radius rH: 1200 km [*D]

other data, primary:
diameter dp: 6.9 ± 2.4 km [K09a]
rotation period RPp: 15.418 ± 0.001 h [K09a]
amplitude in mag., rotational ΔM: 0.35 [C239]
pole direction : ? ; ?


other data, secondary:
diameter ds: 6.1 ± 2.1 km [K09a]
diameter ratio ds/dp: 0.89 ± 0.05 [K09a]
component mag. difference ΔM: ?
rotation period RPs: 15.418 ± 0.001 h [K09a]

-- (809) Lundia --discovery and notes:

Primary discovered 1915 Aug 11 from Heidelberg, Germany by M. F. Wolf. Alternate designation(s): 1915 XP, 1936 VC. Permanent number assigned -.

Named - for Lund Observatory, Sweden.

Companion discovered 2005 Sep 18 by A. Kryszczynska, T. Kwiatkowski, R. Hirsch, M. Polinska, K. Kaminski and A. Marciniak using LC observations from Poznan Astronomical Observatory. Announced 2005 Oct 01 [C0239].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2005-2009, 2014 by Wm. Robert Johnston.
Last modified 26 May 2014.
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