Asteroids with Satellites Database--Johnston's Archive
(5143)
Heracles
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:
NEA, Apollo
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
1.833500481 AU
| |
orbital period P: |
2.482731444 yr
(= 906.8176598 d)
| |
eccentricity e: |
0.772242011
| |
perihelion distance q: |
0.417594382 AU
| |
aphelion distance Q: |
3.24940658 AU
| |
inclination i: |
9.035561353°
| |
argument of perihelion ω: |
227.7059888°
| |
ascending node Ω: |
309.5669202°
| |
mean anomaly M: |
337.4331464°
| |
perihelion passage TP: |
2014 Jul 18.84450
| |
Epoch: |
2014 May 23
| |
data arc: |
1953-2014
(1746 obs.)
| |
Earth MOID: |
0.0585906 AU
| |
Jupiter Tisserand invariant TJ: |
3.583
|
orbital data, secondary:
|
binary dynamical type: | L [M09a] | |
semimajor axis as: |
5
km
[T17a]
| |
separation/primary radius as/rp: | 2.8 [*E] | |
separation/Hill radius as/rH: | 0.043 [*E] | |
orbital period Ps: |
0.6458
± 0.0625
d [T12b]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
0.02
[M09a]
|
|
other data, system (combined):
|
absolute mag. H: |
13.8
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
3.65
km [*D]
| |
geometric albedo: |
0.4
[*E]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
O (SMASSII) [JPL]
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
120 km [*E]
|
other data, primary:
|
diameter dp: |
3.6
± 1.2
km [T12b]
| |
rotation period RPp: |
2.706
± 0.001
h [P12a]
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.6
± 0.3
km [T12b]
| |
diameter ratio ds/dp: |
0.167
± 0.1
[*D]
| |
component mag. difference ΔM: |
3.9
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(5143) Heracles
--discovery and notes:
Primary discovered
1991 Nov 07
from
Palomar Observatory, California, USA
by
C. S. Shoemaker.
Alternate designation(s):
1991 VL,
1962 PG.
Linked to prediscovery observations from 1953 Nov 30.
Permanent number assigned 1992 Mar 18.
Named 1992 Jul 14 for the Greek mythological character [MPC020523].
Companion discovered
2011 Dec 10
by P. A. Taylor, M. C. Nolan, and E. S. Howell
using
radar
observations from Arecibo Observatory, Puerto Rico.
Announced
2012 Jul 13 [T12b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Pilcher, Frederick, Briggs, John W., Franco, Lorenzo, Inasaridze, Raguli Ya., Krugly, Yurij N., Molotiv, Igor E., Klinglesmith, Daniel A., III, Pollock, Joe, & Pravec, Petr 2012, Minor Planet Bulletin Rotation Period Determination for 5143 Heracles
- Taylor, P. A., Nolan, M. C., & Howell, E. S. 2012, Central Bureau Electronic Telegrams (5143) Heracles
- Shestopalov, D. I., McFadden, L. A., & Golubeva, L. F. 2007, Icarus Exploration of faint absorption bands in the reflectance spectra of the asteroids by method of optimal smoothing: Vestoids
- Skiff, B. A., Buie, M. W., & Bowell, E. 1996, Bulletin of the American Astronomical Society Near-Earth Asteroid Physical Observations: 1993-1995
- Binzel, R. P. & Xu, S. 1992, International Astronomical Union Circular 1991 VK, 1991 VL, 1991 WA and 1991 XB
©
2012-2014, 2019
by Wm. Robert Johnston.
Last modified
29 May 2019.
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