Asteroids with Satellites Database--Johnston's Archive
(452561) 2005 AB
compiled by Wm. Robert Johnston
last updated
31 December 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, Amor
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
3.21736237 AU
| |
orbital period P: |
5.77109428 yr
(= 2107.89219 d)
| |
eccentricity e: |
0.655379534
| |
perihelion distance q: |
1.108768919 AU
| |
aphelion distance Q: |
5.32595582 AU
| |
inclination i: |
8.1591426°
| |
argument of perihelion ω: |
63.668338°
| |
ascending node Ω: |
126.279736°
| |
mean anomaly M: |
210.127894°
| |
perihelion passage TP: |
2016 Oct 16.5395
| |
Epoch: |
2014 May 23
| |
data arc: |
2005-2011
(1760 obs.)
| |
Earth MOID: |
0.170002 AU
| |
Jupiter Tisserand invariant TJ: |
2.793
|
orbital data, secondary:
|
binary dynamical type: | A [P07f] | |
semimajor axis as: |
3.4
km
[*E]
| |
separation/primary radius as/rp: | 3.6 [*E] | |
separation/Hill radius as/rH: | 0.021 [*E] | |
orbital period Ps: |
0.7471
± 0.0004
d [R06b]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
0.81
[P07f]
|
|
other data, system (combined):
|
absolute mag. H: |
17.5
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
1.95
km [*D]
| |
geometric albedo: |
0.03
[K06b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
160 km [*E]
|
other data, primary:
|
diameter dp: |
>1.9
km [R06b]
| |
rotation period RPp: |
3.339
± 0.002
h [R06b]
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.46
km [*D]
| |
diameter ratio ds/dp: |
0.24
± 0.02
[R06b]
| |
component mag. difference ΔM: |
3.1
± 0.2
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(452561) 2005 AB
--discovery and notes:
Primary discovered
2005 Jan 01
from
Catalina Station, Arizona, USA
by
Catalina Sky Survey. Permanent number assigned 25 December 2015.
Companion discovered
2005 Feb
by V. Reddy, R. Dyvig, P. Pravec, and P. Kusnirak
using
lightcurve
observations from University of North Dakota, Grand Forks, North Dakota, USA; Badlands Observatory, Quinn, South Dakota, USA; Ondrejov Observatory, Czech Republic.
Announced
2005 Feb 11 [R05b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Reddy, V., Dyvig, R. R., Pravec, P., Kusnirak, P., Kornos, L., Vilagi, J., Galad, A., Gajdos, S., Pray, D. P., Benner, L. A. M., Nolan, M. C., Giorgini, J. D., Ostro, S. J., & Abell, P. A. 2006, 37th Annual Lunar and Planetary Science Conference Photometric and Radar Observations of 2005 AB: A New Binary Near-Earth Asteroid
- Kumar, S., Hardersen, P. S., & Gaffey, M. J. 2006, 37th Annual Lunar and Planetary Science Conference Albedo Estimates and Near-Infrared Reflectance Spectroscopy of Near Earth Asteroids 1999 HF1 and 2005 AB
- Pravec, P. 2005, Society for Astronomical Sciences Annual Symposium Photometric Survey for Asynchronous Binary Asteroids
- Reddy, V., Dyvig, R., Pravec, P., & Kusnirak, P. 2005, International Astronomical Union Circular 2005 AB
- Lopez, A., Pacheco, R., Forteza, J., Christensen, E. J., Beshore, E. C.,
Casey, C. M., Garradd, G. J., Hill, R. E., Larson, S. M., McNaught, R. H.,
Gomez, J. J., Sue, J., Lacruz, J., Birtwhistle, P., & Smalley, K. E. 2005,
Minor Planet Electronic Circulars 2005 AB
©
2005-2014, 2015
by Wm. Robert Johnston.
Last modified
31 December 2015.
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