Asteroids with Satellites Database--Johnston's Archive
(5381)
Sekhmet
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:
NEA, Aten
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
0.947461319 AU
| |
orbital period P: |
0.922253761 yr
(= 336.8531863 d)
| |
eccentricity e: |
0.29623718
| |
perihelion distance q: |
0.66678805 AU
| |
aphelion distance Q: |
1.228134584 AU
| |
inclination i: |
48.969357°
| |
argument of perihelion ω: |
37.435861°
| |
ascending node Ω: |
58.5495966°
| |
mean anomaly M: |
97.948748°
| |
perihelion passage TP: |
2014 Feb 20.34903
| |
Epoch: |
2014 May 23
| |
data arc: |
1991-2014
(201 obs.)
| |
Earth MOID: |
0.112501 AU
| |
Jupiter Tisserand invariant TJ: |
6.027
|
orbital data, secondary:
|
binary dynamical type: | A [P07f] | |
semimajor axis as: |
1.54
± 0.12 km
[N03a]
| |
separation/primary radius as/rp: | 3.1 [*D] | |
separation/Hill radius as/rH: | 0.027 [*D] | |
orbital period Ps: |
0.5208
± 0.012
d [N03a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
1.07
[P07f]
|
|
other data, system (combined):
|
absolute mag. H: |
16.5
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
1.04
km [*D]
| |
geometric albedo: |
0.25
± 0.03
[D04a]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
1.07x1012
kg [*D]
| |
density ρ: |
1.98
± 0.65
g/cm3[N03a]
| |
Hill radius rH: |
56 km [*D]
|
other data, primary:
|
diameter dp: |
1
± 0.05
km [N03a]
| |
rotation period RPp: |
2.7
± 0.4
h [N03a]
| |
amplitude in mag., rotational ΔM: |
0.10
[P03c]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.3
± 0.05
km [N03a]
| |
diameter ratio ds/dp: |
0.3
± 0.052
[*D]
| |
component mag. difference ΔM: |
2.6
[*D]
| |
rotation period RPs: |
10
± 2
h [N03a]
| |
|
|
--
(5381) Sekhmet
--discovery and notes:
Primary discovered
1991 May 14
from
Palomar Observatory, California, USA
by
C. S. Shoemaker.
Alternate designation(s):
1991 JY
.
Permanent number assigned 1992 Nov 10.
Named 1995 Mar 17 for the mythological Egyptian goddess [MPC24917].
Companion discovered
2003 May 08
by M. C. Nolan, E. S. Howell, A. S. Rivkin, and C. D. Neish
using
radar
observations from Arecibo Observatory, Puerto Rico.
Announced
2003 Jul 06 [N03c].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Delbo, Marco, Walsh, Kevin, Mueller, Michael, Harris, Alan W., & Howell, Ellen S. 2011, Icarus The cool surfaces of binary near-Earth asteroids
- Davies, John K., Harris, Alan W., Rivkin, Andrew S., Wolters, Stephen D., Green, Simon F., McBride, Neil, Mann, Rita K., & Kerr, Tom H. 2007, Icarus Near-infrared spectra of 12 Near-Earth Objects
- Connors, M., Brasser, R., Stacey, R. G., & Wiegert, P. 2004, Bulletin of the American Astronomical Society Inner Solar System Dynamical Analogues for Plutinos
- Neish, C. D., Nolan, M. C., Howell, E. S., & Rivkin, A. S. 2003, Bulletin of the American Astronomical Society Radar Observations of Binary Asteroid 5381 Sekhmet
- Nolan, M. C., Howell, E. S., Rivkin, A. S., & Neish, C. D. 2003, International Astronomical Union Circular (5381) Sekhmet
- Pilcher, Frederick 2003, Minor Planet Bulletin Minor planets at unusually favorable elongations in 2003
- Shoemaker, E., Olmstead, C. M., Shoemaker, C., King, T., McCrosky, R. E., Shao, C.-Y., McNaught, R., & Steel, D. 1991, International Astronomical Union Circular 1991 JY
- Green, D. W. E. 1991, International Astronomical Union Circular 1991 JY
- Shoemaker, E. M., Shoemaker, C. S., Olmstead, C. M., Lawler, K. A., & McNaught, R. H. 1991, International Astronomical Union Circular 1991 JY
©
2003-2008, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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