Asteroids with Satellites Database--Johnston's Archive
(199145)
2005 YY128
compiled by Wm. Robert Johnston
last updated
19 February 2023
--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
(PHA)
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
1.6494042506 AU
| |
orbital period P: |
2.1183556059 yr
(= 773.7293851 d)
| |
eccentricity e: |
0.731381246
| |
perihelion distance q: |
0.443060915 AU
| |
aphelion distance Q: |
2.8557475858 AU
| |
inclination i: |
3.7573881°
| |
argument of perihelion ω: |
314.875295°
| |
ascending node Ω: |
300.22136°
| |
mean anomaly M: |
342.47151053°
| |
perihelion passage TP: |
2023 Apr 03.6730761
| |
Epoch: |
2023 Feb 25
| |
data arc: |
2005-2023
(493 obs.)
| |
Earth MOID: |
0.0294205 AU
| |
Jupiter Tisserand invariant TJ: |
3.921
|
orbital data, secondary:
|
semimajor axis as: |
?
| |
orbital period Ps: |
?
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
18.32
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
0.72
km [*E]
| |
geometric albedo: |
(0.16
) [*A]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
25 km [*E]
|
other data, primary:
|
diameter dp: |
0.72
km [*E]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
?
| |
diameter ratio ds/dp: |
?
| |
component mag. difference ΔM: |
?
| |
rotation period RPs: |
?
| |
|
|
--
(199145) 2005 YY128
--discovery and notes:
Primary discovered
2005 Dec 30
from
Kitt Peak Observatory, Arizona, USA
by
Spacewatch Program.
Alternate designation(s):
1970 BD.
Linked to prediscovery observations from 1970 Jan.
Permanent number assigned 2008 Nov 13.
Companion discovered
2023 Feb
using
radar
observations from Goldstone Observatory, California, USA.
Announced
2023 Feb [B23e].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2023
by Wm. Robert Johnston.
Last modified
19 February 2023.
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