Asteroids with Satellites Database--Johnston's Archive
(174567)
Varda
and IImare
compiled by Wm. Robert Johnston
last updated
9 October 2021
--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: |
45.63423503 AU
|
orbital period P: |
308.2793002 yr (= 112599.0144 d)
|
eccentricity e: |
0.141676948
|
perihelion distance q: |
39.1689159 AU
|
aphelion distance Q: |
52.09955415 AU
|
inclination i: |
21.50449895°
|
argument of perihelion ω: |
184.3104877°
|
ascending node Ω: |
184.0316775°
|
mean anomaly M: |
263.7013967°
|
perihelion passage TP: |
2096 Nov 07
|
Epoch: |
2014 May 23
|
data arc: |
1980-2010
(72 obs.)
|
Earth MOID: |
38.1672 AU
|
Jupiter Tisserand invariant TJ: |
5.569
|
Neptune Tisserand invariant TN: | 2.92813717406328 [*D] |
orbital data, secondary:
semimajor axis as: |
4800
± 20 km
[G14a]
|
separation/primary radius as/rp: | 14 [*D] |
separation/Hill radius as/rH: | 0.0023 [*D] |
orbital period Ps: |
5.7508
± 0.0001
d [G14a]
|
eccentricity es: |
0.017
± 0.003
[G14a]
|
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
absolute mag. H: |
3.4
[MPC]
3.61 ± 0.05 [V14a]
|
slope parameter G: |
(0.15) [*A]
|
effective diameter dE: |
792
± 91/84
km [V14a]
|
geometric albedo: |
0.102
± 0.024/0.02
[V14a]
|
color index U-B: |
?
|
color index B-V: |
0.9
[P13c]
|
color index V-R: | 0.55 ± 0.04 [P13c] |
color index B-R: | 1.45 ± 0.06 [P13c] |
color index V-I: | 1.07 ± 0.05 [P13c] |
taxonomic type: |
IR (G-mode) [P13c]
|
mass m: |
2.65x1020
± 3.9x1018
kg [V14a]
|
density ρ: |
1.24
± 0.04
g/cm3[G15c]
|
Hill radius rH: |
2100000 km [*D]
|
other data, primary:
diameter dp: |
705
± 81/75
km [V14a]
|
rotation period RPp: |
5.91
h [T14a]
|
amplitude in mag., rotational ΔM: |
0.04
± 0.01
[T14a]
|
pole direction Β, λ: |
?
,
?
|
other data, secondary:
diameter ds: |
326
± 38
km [G15c]
|
diameter ratio ds/dp: |
0.45
± 0.009
[G15c]
|
component mag. difference ΔM: |
1.73
± 0.04
[*D]
|
rotation period RPs: |
?
|
|
|
--
(174567) Varda and IImare
--discovery and notes:
Primary discovered
2003 Jun 21
from
Kitt Peak Observatory, Arizona, USA
by
J. A. Larsen.
Alternate designation(s):
2003 MW12
.
Linked to prediscovery observations from 1980 Mar 19.
Permanent number assigned 2008 Jan 22.
Named 2014 Jan 16 for the fictional goddess in J. R. R. Tolkien's writings [MPC086715].
Companion discovered
2009 Apr 26
by W. M. Grundy, S. D. Benecchi, M. W. Buie, K. S. Noll, S. B. Porter, H. G. Roe, J. A. Stansberry, and C. A. Trujillo
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2011 Sep [G11b].
Permanent designation I IImare, assigned 2014 Jan 16; named for the character in J. R. R. Tolkien's fiction [MPC86715].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Vilenius, E., Kiss, C., Müller, T., Mommert, M., Santos-Sanz, P., Pál, A., Stansberry, J., Mueller, M., Peixinho, N., Lellouch, E., Fornasier, S., Delsanti, A., Thirouin, A., Ortiz, J. L., Duffard, R., Perna, D., & Henry, F. 2014, Astronomy and Astrophysics "TNOs are Cool": A survey of the trans-Neptunian region. X. Analysis of classical Kuiper belt objects from Herschel and Spitzer observations
- Larsen, Jeffrey A., Roe, Eric S., Albert, C. Elise, Descour, Anne S., McMillan, Robert S., Gleason, Arianna E., Jedicke, Robert, Block, Miwa, Bressi, Terrence H., Cochran, Kim C., Gehrels, Tom, Montani, Joseph L., Perry, Marcus L., Read, Michael T., Scotti, James V., & Tubbiolo, Andrew F. 2007, The Astronomical Journal The Search for Distant Objects in the Solar System Using Spacewatch
©
2011-2015, 2021
by Wm. Robert Johnston.
Last modified
9 October 2021.
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