Asteroids with Satellites Database--Johnston's Archive
(5817)
Robertfrazer
compiled by Wm. Robert Johnston
last updated
30 April 2022
--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: |
2.4080052349 AU
| |
orbital period P: |
3.7366820008 yr
(= 1364.8488776 d)
| |
eccentricity e: |
0.340451816
| |
perihelion distance q: |
1.58819548 AU
| |
aphelion distance Q: |
3.2278149902 AU
| |
inclination i: |
21.1071678°
| |
argument of perihelion ω: |
82.834324°
| |
ascending node Ω: |
340.465609°
| |
mean anomaly M: |
45.3274335°
| |
perihelion passage TP: |
2019 Dec 11.152509
| |
Epoch: |
2020 May 31
| |
data arc: |
1959-2020
(1801 obs.)
| |
Earth MOID: |
0.74502 AU
| |
Jupiter Tisserand invariant TJ: |
3.354
|
orbital data, secondary:
|
semimajor axis as: |
16
km
[*E]
| |
separation/primary radius as/rp: | 5.0 [*E] | |
separation/Hill radius as/rH: | 0.020 [*E] | |
orbital period Ps: |
1.2026
± 0.0003
d [S20b]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
12.94
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
6.50
± 1.40
km [N16c]
| |
geometric albedo: |
0.297
± 0.162
[N16c]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
S (SMASSII) [JPL]
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
790 km [*E]
|
other data, primary:
|
diameter dp: |
6.39
± 1.38
km [*D]
| |
rotation period RPp: |
4.05083
± 0.000005
h [S20b]
| |
amplitude in mag., rotational ΔM: |
0.32
[S20b]
| |
amplitude in mag., mutual events ΔM: | 0.12 [S20b] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>1.21
km [*D]
| |
diameter ratio ds/dp: |
>0.19
[W21b]
| |
component mag. difference ΔM: |
<3.61
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(5817) Robertfrazer
--discovery and notes:
Primary discovered
1989 Sep 05
from
Palomar Observatory, California, USA
by
E. F. Helin.
Alternate designation(s):
1989 RZ,
1959 RH, 1959 RQ.
Linked to prediscovery observations from 1959 Sep 01.
Permanent number assigned 1994 Jan 27.
Named 2000 Jul 26 for Robert E. Frazer (1918-) [MPC041027].
Companion discovered
2020 Jan 10
by R. D. Stephens and B. D. Warner
using
lightcurve
observations from Center for Solar System Studies, Landers, California, USA; Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA; Belgrade Astronomical Observatory, Belgrade, Serbia.
Announced
2020 Jun [S20b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2020-2021, 2022
by Wm. Robert Johnston.
Last modified
30 April 2022.
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