Asteroids with Satellites Database--Johnston's Archive
2003 QR91
compiled by Wm. Robert Johnston
last updated
20 September 2014
--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: |
46.376 AU
| |
orbital period P: |
315.821 yr
(= 115353.7 d)
| |
eccentricity e: |
0.17962
| |
perihelion distance q: |
38.045 AU
| |
aphelion distance Q: |
54.706 AU
| |
inclination i: |
3.49874°
| |
argument of perihelion ω: |
12.76°
| |
ascending node Ω: |
273.3090°
| |
mean anomaly M: |
30.59°
| |
perihelion passage TP: |
1987 Jul 22
| |
Epoch: |
2014 May 23
| |
data arc: |
2003-2009
(17 obs.)
| |
Earth MOID: |
37.0284 AU
| |
Jupiter Tisserand invariant TJ: |
5.975
|
| Neptune Tisserand invariant TN: | 3.09 [*D] |
orbital data, secondary:
|
semimajor axis as: |
1790
± 60 km
(separation)
[N08c]
| |
separation/primary radius as/rp: | 17 [*E] | |
separation/Hill radius as/rH: | 0.0028 [*E] | |
orbital period Ps: |
7.5
d [*E]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
6.5
[MPC]
6.55 ± 0.56 [V14a]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
280
± 27/30
km [V14a]
| |
geometric albedo: |
0.054
± 0.035/0.028
[V14a]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1
g/cm3) [*A]
| |
Hill radius rH: |
630000 km [*E]
|
other data, primary:
|
diameter dp: |
207
± 21
km [V14a]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
189
± 29
km [V14a]
| |
diameter ratio ds/dp: |
0.912
± 0.103
[N08c]
| |
component mag. difference ΔM: |
0.2
± 0.3
[N08c]
| |
rotation period RPs: |
?
| |
|
|
--
2003 QR91
--discovery and notes:
Primary discovered
2003 Aug 24
from
Cerro Tololo Observatory, La Serena, Chile
by
M. W. Buie.
Companion discovered
-
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2007 Mar 14.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Noll, Keith S., Grundy, William M., Chiang, Eugene I., Margot, Jean-Luc, & Kern, Susan D. 2007, ArXiv Astrophysics e-prints Binaries in the Kuiper Belt
- Pittichova, J., Meech, K. J., Wasserman, L. H., & Marsden, B. G. 2004, Minor Planet Electronic Circulars 2003 QR91
- Buie, M. W., Wasserman, L. H., Millis, R. L., Kern, S. D., Hutchison, L. E., Qu, J. J., Lundgren, E. W., Gulbisdgren, A. A. S., Kane, J. F., & Marsden, B. G. 2003, Minor Planet Electronic Circulars EIGHT TNOs
©
2007-2008, 2014
by Wm. Robert Johnston.
Last modified
20 September 2014.
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