Asteroids with Satellites Database--Johnston's Archive
1998 WW31
and S/2000 (1998 WW31) 1
compiled by Wm. Robert Johnston
last updated
27 May 2019
--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: |
44.4317 AU
|
orbital period P: |
296.169 yr (= 108177.7 d)
|
eccentricity e: |
0.09103
|
perihelion distance q: |
40.3869 AU
|
aphelion distance Q: |
48.4764 AU
|
inclination i: |
6.82399°
|
argument of perihelion ω: |
50.0586°
|
ascending node Ω: |
237.1556°
|
mean anomaly M: |
141.8396°
|
perihelion passage TP: |
1902 Aug 17.1
|
Epoch: |
2019 Apr 27
|
data arc: |
1998-2011
(32 obs.)
|
Earth MOID: |
39.3742 AU
|
Jupiter Tisserand invariant TJ: |
5.896
|
Neptune Tisserand invariant TN: | 3.081 [*D] |
orbital data, secondary:
semimajor axis as: |
22617
± 42 km
[G19b]
|
separation/primary radius as/rp: | 310 [*D] |
separation/Hill radius as/rH: | 0.049 [*D] |
orbital period Ps: |
587.27
± 0.18
d [G19b]
|
eccentricity es: |
0.8193
± 0.002
[G19b]
|
inclination is: | 41.36° ± 0.38° [G19b] |
ascending node Ωs: | 94.58° ± 0.72° [G19b] |
argument of pericenter ωs: | 348.49° ± 0.63° [G19b] |
mean anomaly M: | 30.83° ± 0.34° [G19b] |
Epoch: | 2002 Jan 25.5 |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
absolute mag. H: |
6.7
[MPC]
|
slope parameter G: |
(0.15) [*A]
|
effective diameter dE: |
192
km [*D]
|
geometric albedo: |
0.054
± 0.005
[V02a]
|
color index U-B: |
?
|
color index B-V: |
?
|
color index R-J: | 1.49 ± 0.21 [T03a] |
color index J-H: | 0.34 ± 0.23 [T03a] |
taxonomic type: |
?
|
mass m: |
2.66x1018
± 1.5x1016
kg [G19b]
|
density ρ: |
(1
g/cm3) [*A]
|
Hill radius rH: |
460000 km [*D]
|
other data, primary:
diameter dp: |
148
km [V02a]
|
rotation period RPp: |
?
|
amplitude in mag., rotational ΔM: |
?
|
pole direction Β, λ: |
?
,
?
|
other data, secondary:
diameter ds: |
123
km [V02a]
|
diameter ratio ds/dp: |
0.833
[V02a]
|
component mag. difference ΔM: |
0.4
[*D]
|
rotation period RPs: |
?
|
|
|
--
1998 WW31 and S/2000 (1998 WW31) 1
--discovery and notes:
Primary discovered
1998 Nov 18
from
Kitt Peak Observatory, Arizona, USA
by
M. W. Buie.
Companion discovered
2000 Dec 22
by C. Veillet, A. Doressoudiram, and J. Shapiro
using
imaging
observations from CFHT Telescope, Mauna Kea, Hawaii, USA.
Announced
2001 Apr 16 [V01a].
Provisional designation S/2000 (1998 WW31) 1.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Petit, J.-M. & Mousis, O. 2004, Icarus KBO binaries: how numerous were they?
- Takato, Naruhisa, Fuse, Tetsuharu, Gaessler, Wolfgang, Goto, Miwa, Kanzawa, Tomio, Kobayashi, Naoto, Minowa, Yosuke, Oya, Shin, Pyo, Tae-Soo, Saint-Jacque, D., Takami, Hideki, Terada, Hiroshi, Hayano, Yutaka, Iye, Masanori, Kamata, Yukiko, & Tokunaga, A. T. 2003, Earth Moon and Planets Near-Infrared Colors of the Binary Kuiper Belt Object 1998 WW<SUB>31</SUB>
- Veillet, C., Griffin, I. P., & Parker, J. Wm. 2002, Bulletin of the American Astronomical Society Dynamics of the Binary KBO 1998 WW31 and Predictions of Mutual Eclipses
- Millis, R. L., Buie, M. W., Wasserman, L. H., Elliot, J. L., Kern, S. D., Clancy, K., Wagner, R. M., Chiang, E. I., Jordan, A., Trilling, D. E., & Meech, K. J. 2002, Bulletin of the American Astronomical Society The Deep Ecliptic Survey - A Status Report
- Veillet, Christian 2002, HST Proposal A binary system in the Kuiper Belt: 1998_WW31
- Veillet, Christian, Parker, Joel Wm., Griffin, Ian, Marsden, Brian, Doressoundiram, Alain, Buie, Marc, Tholen, David J., Connelley, Michael, & Holman, Matthew J. 2002, Nature The binary Kuiper-belt object 1998 WW31
- Noll, K., Stephens, D., Grundy, W., Spencer, J., Millis, R., Buie, M., Cruikshank, D., Tegler, S., & Romanishin, W. 2002, International Astronomical Union Circular 1997 CQ_29
- Parker, J. W., Veillet, C., & Griffin, I. 2001, AGU Fall Meeting Abstracts Multiplicity in the Kuiper Belt: The First Discovery of a Binary Trans-Neptunian Object
- Tholen, D. J. & Connelley, M. S. 2001, Bulletin of the American Astronomical Society Recent Results from Follow-up Astrometric Observations of KBOs and NEOs
- Veillet, C., Parker, J. W., Griffin, I. P., Marsden, B. G., Doressoundiram, A., Tholen, D. J., Buie, M. W., & Holman, M. J. 2001, Bulletin of the American Astronomical Society Multiplicity in the Kuiper Belt: The First Discovery of a Binary Trans-Neptunian Object
- Millis, R. L., Buie, M. W., Wasserman, L. H., Elliot, J. L., Kern, S. D., Wagner, R. M., Chiang, E., & Trilling, D. 2001, Bulletin of the American Astronomical Society The Deep Ecliptic Survey -- A Status Report
- Veillet, Christian 2001, HST Proposal Constraining the highly eccentric orbit of the companio of the binary TNO 1998 WW31 by observations at its pericenter
- Veillet, C., Doressoundiram, A., Shapiro, J., Kavelaars, J. J., & Morbidelli, A. 2001, International Astronomical Union Circular S/2000 (1998 WW_31) 1
- Veillet, C., Doressoundiram, A., Shapiro, J., Buie, M. W., & Marsden, B. G. 2001, Minor Planet Electronic Circ., 2001-G29 (2001). 1998 WW31
- Veillet, Christian 2000, HST Proposal Astrometry and Photometry of the binary TNO 1998 WW31
- Millis, R. L., Buie, M. W., Wagner, R. M., Willmarth, D. W., Smith, P. S., Harmer, D. L., Saha, A., Elliot, J. L., Holman, M. J., Grav, T., & Marsden, B. G. 1999, Minor Planet Electronic Circ., 1999-B24 (1999). 1998 WW31
©
2001-2015, 2019
by Wm. Robert Johnston.
Last modified
27 May 2019.
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