Asteroids with Satellites Database--Johnston's Archive
(76818)
Brianenke
compiled by Wm. Robert Johnston
last updated
20 October 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: |
1.9297747003 AU
| |
orbital period P: |
2.6807722091 yr
(= 979.1705422 d)
| |
eccentricity e: |
0.095975689
| |
perihelion distance q: |
1.744563245 AU
| |
aphelion distance Q: |
2.114896156 AU
| |
inclination i: |
18.136534°
| |
argument of perihelion ω: |
129.701396°
| |
ascending node Ω: |
292.314349°
| |
mean anomaly M: |
320.302461°
| |
perihelion passage TP: |
2019 Aug 12.974057
| |
Epoch: |
2019 Apr 27
| |
data arc: |
1980-2018
(1150 obs.)
| |
Earth MOID: |
0.794718 AU
| |
Jupiter Tisserand invariant TJ: |
3.848
|
orbital data, secondary:
|
binary dynamical type: | A [P07f] | |
semimajor axis as: |
5.6
km
[*E]
| |
separation/primary radius as/rp: | 3.1 [*E] | |
separation/Hill radius as/rH: | 0.011 [*E] | |
orbital period Ps: |
0.5885
± 0.00004
d [W09a]
| |
eccentricity es: |
<0.13
[P16d]
| |
normalized ang. mom. αL: |
0.96
[P07f]
|
|
other data, system (combined):
|
absolute mag. H: |
13.7
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
3.84
km [*D]
| |
geometric albedo: |
0.43
[*E]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
500 km [*E]
|
other data, primary:
|
diameter dp: |
3.6
km [P06b]
| |
rotation period RPp: |
3.166
± 0
h [W05c]
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.33
km [*D]
| |
diameter ratio ds/dp: |
0.37
± 0.03
[W05c]
| |
component mag. difference ΔM: |
2.2
± 0.2
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(76818) Brianenke
--discovery and notes:
Primary discovered
2000 Sep 08
from
Socorro, New Mexico, USA
by
LINEAR Program.
Alternate designation(s):
2000 RG79,
1999 JL6.
Linked to prediscovery observations from 1980 Feb 20.
Permanent number assigned 2004 Feb 06.
Named 2019 Aug 27 for Brian L. Enke (1964-) [MPC115894].
Companion discovered
2005 Aug
using
lightcurve
observations.
Announced
2005 Aug 30.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Warner, Brian D. 2014, Minor Planet Bulletin Binary Asteroid Lightcurve Analysis at the CS3-Palmer Divide Station: 2013 June-September
- 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, Brian D. & Stephens, Robert D. 2009, Minor Planet Bulletin Lightcurve Analysis of Two Binary Asteroids: (76818) 2000 RG79 and (185851) 2000 DP107
- Warner, B. D., Pravec, P., & Pray, D. 2005, International Astronomical Union Circular (76818) 2000 RG_79
- Warner, B. D., Pravec, P., & Pray, D. 2005, Central Bureau Electronic Telegrams (76818) 2000 RG_79
©
2005-2014, 2019
by Wm. Robert Johnston.
Last modified
20 October 2019.
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