Asteroids with Satellites Database--Johnston's Archive
(410777)
2009 FD
compiled by Wm. Robert Johnston
last updated
27 November 2015
--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, Apollo
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
1.1631569199 AU
| |
orbital period P: |
1.254461864 yr
(= 458.20084948 d)
| |
eccentricity e: |
0.492921576
| |
perihelion distance q: |
0.589811778 AU
| |
aphelion distance Q: |
1.7365020618 AU
| |
inclination i: |
3.1364499°
| |
argument of perihelion ω: |
281.316741°
| |
ascending node Ω: |
9.475028°
| |
mean anomaly M: |
307.4865823°
| |
perihelion passage TP: |
2015 Sep 01.8380350
| |
Epoch: |
2015 Jun 27
| |
data arc: |
2009-2015
(291 obs.)
| |
Earth MOID: |
0.00231683 AU
| |
Jupiter Tisserand invariant TJ: |
5.295
|
orbital data, secondary:
|
semimajor axis as: |
0.25
km
[N15d]
| |
separation/primary radius as/rp: | 3.0 [*D] | |
separation/Hill radius as/rH: | 0.034 [*E] | |
orbital period Ps: |
0.6
d [*E]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
22.1
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
0.17
± 0.04
km [*D]
| |
geometric albedo: |
0.09
[*D]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
7 km [*E]
|
other data, primary:
|
diameter dp: |
0.15
± 0.03
km [N15d]
| |
rotation period RPp: |
4
h [JPL]
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.09
± 0.03
km [N15d]
| |
diameter ratio ds/dp: |
0.6
[*D]
| |
component mag. difference ΔM: |
1.1
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(410777) 2009 FD
--discovery and notes:
Primary discovered
2009 Feb 24
from
Kitt Peak Observatory, Arizona, USA
by
Spacewatch Program.
Permanent number assigned -.
Companion discovered
2015 Oct 25
by S. P. Naidu, L. A. M. Benner, M. Brozovic, J. D. Giorgini, J. S. Jao, C. G. Lee, L. G. Snedeker, K. J. Lawrence, M. W. Busch, P. A. Taylor, J. E. Richardson, and E. G. Rivera-Valentin
using
radar
observations from Goldstone Observatory, California, USA; Arecibo Observatory, Puerto Rico.
Announced
2015 Oct [N15d].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2015
by Wm. Robert Johnston.
Last modified
27 November 2015.
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