Asteroids with Satellites Database--Johnston's Archive
(1879)
Broederstroom
compiled by Wm. Robert Johnston
last updated
26 March 2024
--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
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
2.24560661043 AU
| |
orbital period P: |
3.36518325615 yr
(= 1229.13318431 d)
| |
eccentricity e: |
0.14875479821
| |
perihelion distance q: |
1.9115618522 AU
| |
aphelion distance Q: |
2.57965136862 AU
| |
inclination i: |
1.726921302°
| |
argument of perihelion ω: |
174.11936657°
| |
ascending node Ω: |
249.86634911°
| |
mean anomaly M: |
9.90540483°
| |
perihelion passage TP: |
2023 Aug 10.18038395
| |
Epoch: |
2023 Sep 13
| |
data arc: |
1935-2024
(4371 obs.)
| |
Earth MOID: |
0.923741 AU
| |
Jupiter Tisserand invariant TJ: |
3.616
|
orbital data, secondary:
|
semimajor axis as: |
25
km
[*E]
| |
separation/primary radius as/rp: | 7.1 [*E] | |
separation/Hill radius as/rH: | 0.024 [*E] | |
orbital period Ps: |
1.993
± 0.0008
d [B24c]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
12.86
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
7.44
± 0.24
km [M19a]
| |
geometric albedo: |
0.242
± 0.031
[M19a]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
1100 km [*E]
|
other data, primary:
|
diameter dp: |
7.04
± 0.23
km [*D]
| |
rotation period RPp: |
3.01543
± 0.00008
h [B24c]
| |
amplitude in mag., rotational ΔM: |
0.16
[B24c]
| |
amplitude in mag., mutual events ΔM: | 0.12 [B24c] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
2.39
± 0.16
km [*D]
| |
diameter ratio ds/dp: |
0.34
± 0.02
[B24c]
| |
component mag. difference ΔM: |
2.34
± 0.13
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(1879) Broederstroom
--discovery and notes:
Primary discovered
1935 Oct 16
from
Johannesburg, South Africa
by
H. van Gent.
Alternate designation(s):
1935 UN,
1950 AD, 1950 CV, 1950 DB1, 1972 RS1, 1984 HJ2.
Permanent number assigned -.
Named 1982 Apr 08 [MPC006833].
Companion discovered
2024 Jan 22
by V. Benishek, P. Pravec, A. Marchini, R. Papini, F. Pilcher, N. Ruocco, and R. Durkee
using
lightcurve
observations from Sopot Observatory, Serbia; Astronomical Observatory of the University of Siena, Italy; Organ Mesa Observatory, Las Cruces, New Mexico, USA; Nastro Verde Observatory, Sorento, Italy; Shed of Science South Observatory, Pontotoc, Texas, USA.
Announced
2024 Mar 26 [B24c].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2024
by Wm. Robert Johnston.
Last modified
26 March 2024.
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