Asteroids with Satellites Database--Johnston's Archive
2005 BW49
compiled by Wm. Robert Johnston
last updated
22 March 2020
--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:
TNO, Cubewano
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
43.864 AU
| |
orbital period P: |
290.52 yr
(= 106112 d)
| |
eccentricity e: |
0.0756
| |
perihelion distance q: |
40.548 AU
| |
aphelion distance Q: |
47.181 AU
| |
inclination i: |
2.10308°
| |
argument of perihelion ω: |
124.92°
| |
ascending node Ω: |
58.953°
| |
mean anomaly M: |
326.55°
| |
perihelion passage TP: |
2047 May 31
| |
Epoch: |
2020 May 31
| |
data arc: |
2004-2013
(22 obs.)
| |
Earth MOID: |
39.5509 AU
| |
Jupiter Tisserand invariant TJ: |
5.905
|
| Neptune Tisserand invariant TN: | 3.093 [*D] |
orbital data, secondary:
|
semimajor axis as: |
2956
± 51 km
(separation)
[G20a]
| |
separation/primary radius as/rp: | 45 [*E] | |
separation/Hill radius as/rH: | 0.0075 [*E] | |
orbital period Ps: |
36
d [*E]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
6.6
[MPC]
7.2 ± 0.5 [G20a]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
161
km [*E]
| |
geometric albedo: |
(0.09
) [*A]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1
g/cm3) [*A]
| |
Hill radius rH: |
390000 km [*E]
|
other data, primary:
|
diameter dp: |
131
km [*E]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
94
km [*E]
| |
diameter ratio ds/dp: |
0.71
| |
component mag. difference ΔM: |
0.73
[G20a]
| |
rotation period RPs: |
?
| |
|
|
--
2005 BW49
--discovery and notes:
Primary discovered
2005 Jan 16
from
Mauna Kea, Hawaii, USA
by
B. Gladman.
Linked to prediscovery observations from 2004 Mar 18.
Companion discovered
2020 Feb 12
by Solar System Origins Legacy Survey (A. H. Parker et al.)
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2020 Feb 23 [G20a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2020
by Wm. Robert Johnston.
Last modified
22 March 2020.
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