Asteroids with Satellites Database--Johnston's Archive
(5477)
Holmes
compiled by Wm. Robert Johnston
last updated
29 May 2019
--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, Hungaria
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
1.917452812 AU
| |
orbital period P: |
2.655187713 yr
(= 969.8073123 d)
| |
eccentricity e: |
0.075236158
| |
perihelion distance q: |
1.773191031 AU
| |
aphelion distance Q: |
2.061714594 AU
| |
inclination i: |
22.54787325°
| |
argument of perihelion ω: |
290.3082655°
| |
ascending node Ω: |
49.13796957°
| |
mean anomaly M: |
135.4358434°
| |
perihelion passage TP: |
2013 May 23.1481
| |
Epoch: |
2014 May 23
| |
data arc: |
1989-2014
(940 obs.)
| |
Earth MOID: |
0.841282 AU
| |
Jupiter Tisserand invariant TJ: |
3.832
|
orbital data, secondary:
|
binary dynamical type: | A [P07f] | |
semimajor axis as: |
6.7
km
[*E]
| |
separation/primary radius as/rp: | 4.5 [*E] | |
separation/Hill radius as/rH: | 0.016 [*E] | |
orbital period Ps: |
1.018
± 0.0008
d [W05a]
| |
eccentricity es: |
<0.05
[P16d]
| |
normalized ang. mom. αL: |
1.07
[P07f]
|
|
other data, system (combined):
|
absolute mag. H: |
14
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
3.15
± 0.14
km [M11b]
| |
geometric albedo: |
0.31
± 0.038
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
410 km [*E]
|
other data, primary:
|
diameter dp: |
2.95
± 0.13
km [*D]
| |
rotation period RPp: |
2.9943
± 0.0002
h [W05a]
| |
amplitude in mag., rotational ΔM: |
0.11
[W05a]
| |
amplitude in mag., mutual events ΔM: | 0.18 ±0.04 [W05a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.09
± 0.08
km [*D]
| |
diameter ratio ds/dp: |
0.37
± 0.02
[W05a]
| |
component mag. difference ΔM: |
2.16
± 0.12
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(5477) Holmes
--discovery and notes:
Primary discovered
1989 Oct 27
from
Palomar Observatory, California, USA
by
E. F. Helin.
Alternate designation(s):
1989 UH2
.
Permanent number assigned 1993 Mar 08.
Named 2011 Feb 18 for Robert E. Holmes Jr. (1956-) [MPC073983].
Companion discovered
2005 Nov 02
by B. D. Warner, P. Pravec, P. Kusnirak, W. Cooney, J. Gross, D. Terrell, D. Higgins, L. Kornos, J. Vilagi, D. Pray, G. Masi, and F. Mallia
using
lightcurve
observations from Palmer Divide Observatory, Colorado Springs; Ondrejov Observatory, Czech Republic; Sonoita Research Observatory, Sonoita, Arizona, USA; Ngunnawal, Canberra, Australia; Modra Observatory, Slovakia; Greene, Rhode Island, USA; Universita degli Studi di Roma "Tor Vergata"; Campo Catino, Italy.
Announced
2005 Nov 15 [W05a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Warner, Brian D., Stephens, Robert D., & Coley Daniel 2012, Minor Planet Bulletin Lightcurve for the Hungaria Binary 5477 Holmes
- Warner, Brian D., Pravec, Petr, Kusnirak, Peter, Harris, Alan W., Cooney, Walter R., Jr., Gross, John, Terrell, Dirk, Nudds, Shannon, Vilagi, Josef, Gajdos, Stefan, Masi, Gianluca, Pray, Donald P., Dyvig, Ron, & Reddy, Vishnu 2011, Minor Planet Bulletin Lightcurves from the Initial Discovery of Four Hungaria Binary Asteroids
- Warner, B. D., Pravec, P., Kusnirak, P., Cooney, W., Gross, J., Terrell, D., Higgins, D., Kornos, L., Vilagi, J., Pray, D., Masi, G., & Mallia, F. 2005, Central Bureau Electronic Telegrams (5477) 1989 UH_2
©
2005-2014, 2019
by Wm. Robert Johnston.
Last modified
29 May 2019.
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