Asteroids with Satellites Database--Johnston's Archive
(3309)
Brorfelde
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:
main belt asteroid, Hungaria
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
1.817472098 AU
| |
orbital period P: |
2.450246799 yr
(= 894.9526434 d)
| |
eccentricity e: |
0.053273893
| |
perihelion distance q: |
1.720648283 AU
| |
aphelion distance Q: |
1.914295912 AU
| |
inclination i: |
21.13386726°
| |
argument of perihelion ω: |
218.6272573°
| |
ascending node Ω: |
29.8075185°
| |
mean anomaly M: |
313.5223649°
| |
perihelion passage TP: |
2014 Sep 15.5424
| |
Epoch: |
2014 May 23
| |
data arc: |
1982-2014
(909 obs.)
| |
Earth MOID: |
0.728988 AU
| |
Jupiter Tisserand invariant TJ: |
3.964
|
orbital data, secondary:
|
binary dynamical type: | A [P07f] | |
semimajor axis as: |
9
km
[*E]
| |
separation/primary radius as/rp: | 3.7 [*E] | |
separation/Hill radius as/rH: | 0.014 [*E] | |
orbital period Ps: |
0.77
± 0.0004
d [W05d]
| |
eccentricity es: |
<0.08
[P16d]
| |
normalized ang. mom. αL: |
1.09
[P07f]
|
|
other data, system (combined):
|
absolute mag. H: |
13.6
[MPC]
13.4 ± 0.2 [W05d]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
5.04
± 0.08
km [M12b]
| |
geometric albedo: |
0.253
± 0.172
[M12b]
| |
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: |
660 km [*E]
|
other data, primary:
|
diameter dp: |
4.88
± 0.08
km [*D]
| |
rotation period RPp: |
2.5041
± 0.0002
h [W05d]
| |
amplitude in mag., rotational ΔM: |
0.09
[W05d]
| |
amplitude in mag., mutual events ΔM: | 0.11 ±0.04 [W05d] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.27
± 0.1
km [*D]
| |
diameter ratio ds/dp: |
0.26
± 0.02
[W05d]
| |
component mag. difference ΔM: |
2.93
± 0.17
[*D]
| |
rotation period RPs: |
18.45
± 0.01
h [W09d]
| |
|
|
--
(3309) Brorfelde
--discovery and notes:
Primary discovered
1982 Jan 28
from
Brorfelde, Denmark
by
K. S. Jensen.
Alternate designation(s):
1982 BH
.
Permanent number assigned 1985 Sep 29.
Named 1987 Sep 07 for the village of Brorfelde, Zealand, Denmark [MPC012210].
Companion discovered
2005 Oct 25
by B. D. Warner, P. Pravec, P. Kusnirak, W. Cooney, J. Gross, D. Terrell, and S. Nudds
using
lightcurve
observations from Palmer Divide Observatory, Colorado Springs, Colorado, USA; Ondrejov Observatory, Czech Republic; Sonoita Research Observatory, Sonoita, Arizona, USA; University of Western Ontario, Ontario, Canada.
Announced
2005 Nov 07 [W05d].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Warner, Brian D. 2009, Minor Planet Bulletin Analysis of the Hungaria Binary Asteroid 3309 Brorfelde
- Warner, B. D., Pravec, P., Kusnirak, P., Cooney, W., Gross, J., Terrell, D., & Nudds, S. 2005, Central Bureau Electronic Telegrams (3309) Brorfelde
- Bus, S. & Binzel, R. P. 2004, NASA Planetary Data System 3309 Brorfelde CCD Spectrum
©
2005-2014, 2019
by Wm. Robert Johnston.
Last modified
29 May 2019.
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