Asteroids with Satellites Database--Johnston's Archive
(2044)
Wirt
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:
Mars crossing asteroid
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
2.380343808 AU
| |
orbital period P: |
3.672550162 yr
(= 1341.3989470 d)
| |
eccentricity e: |
0.343768410
| |
perihelion distance q: |
1.56205680 AU
| |
aphelion distance Q: |
3.198630814 AU
| |
inclination i: |
23.974369°
| |
argument of perihelion ω: |
50.386700°
| |
ascending node Ω: |
53.673166°
| |
mean anomaly M: |
91.418104°
| |
perihelion passage TP: |
2013 Jun 16.36625
| |
Epoch: |
2014 May 23
| |
data arc: |
1950-2014
(625 obs.)
| |
Earth MOID: |
0.653038 AU
| |
Jupiter Tisserand invariant TJ: |
3.347
|
orbital data, secondary:
|
binary dynamical type: | A [P07f] | |
semimajor axis as: |
12
km
[*E]
| |
separation/primary radius as/rp: | 3.7 [*E] | |
separation/Hill radius as/rH: | 0.015 [*E] | |
orbital period Ps: |
0.7904
± 0.0004
d [P06f]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
0.79
[P07f]
|
|
other data, system (combined):
|
absolute mag. H: |
13
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
6.66
± 0.6
km [T04c]
| |
geometric albedo: |
0.191
± 0.038
[T04c]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
790 km [*E]
|
other data, primary:
|
diameter dp: |
6.46
± 0.58
km [*D]
| |
rotation period RPp: |
3.6898
± 0.0001
h [P06f]
| |
amplitude in mag., rotational ΔM: |
0.26
[P06f]
| |
amplitude in mag., mutual events ΔM: | 0.11 ±0.04 [P06f] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.62
± 0.19
km [*D]
| |
diameter ratio ds/dp: |
0.25
± 0.02
[P06f]
| |
component mag. difference ΔM: |
3.0
± 0.2
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(2044) Wirt
--discovery and notes:
Primary discovered
1950 Nov 08
from
Lick Observatory, Mount Hamilton, California, USA
by
C. A. Wirtanen.
Alternate designation(s):
1950 VE
.
Permanent number assigned -.
Named 1981 Jan 01 for Carl A. Wirtanen (1910-1990) [MPC5688].
Companion discovered
2005 Dec 08
by D. Pray, P. Pravec, P. Kusnirak, W. Cooney, J. Gross, D. Terrell, A. Galad, S. Gajdos, J. Vilagi, and R. Durkee
using
lightcurve
observations from Carbuncle Hill Observatory, Greene, Rhode Island, USA; Ondrejov Observatory, Czech Republic; Sonoita Research Observatory, Sonoita, Arizona, USA; Modra Observatory, Slovakia; Minneapolis, MN, USA.
Announced
2006 Jan 06 [P06f].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Pray, D., Pravec, P., Kusnirak, P., Cooney, W., Gross, J., Terrell, D., Galad, A., Gajdos, S., Vilagi, J., & Durkee, R. 2006, Central Bureau Electronic Telegrams (2044) Wirt
©
2006-2008, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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