Asteroids with Satellites Database--Johnston's Archive
(88611)
Teharonhiawako
and Sawiskera
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: |
43.894 AU
| |
orbital period P: |
290.816 yr
(= 106220.7 d)
| |
eccentricity e: |
0.029879
| |
perihelion distance q: |
42.583 AU
| |
aphelion distance Q: |
45.206 AU
| |
inclination i: |
2.58688°
| |
argument of perihelion ω: |
233.57°
| |
ascending node Ω: |
304.8357°
| |
mean anomaly M: |
159.46°
| |
perihelion passage TP: |
1885 Jul 28
| |
Epoch: |
2014 May 23
| |
data arc: |
2000-2012
(63 obs.)
| |
Earth MOID: |
41.5878 AU
| |
Jupiter Tisserand invariant TJ: |
5.919
|
| Neptune Tisserand invariant TN: | 3.10 [*D] |
orbital data, secondary:
|
semimajor axis as: |
27670
± 120 km
[G11a]
| |
separation/primary radius as/rp: | 310 [*D] | |
separation/Hill radius as/rH: | 0.059 [*D] | |
orbital period Ps: |
828.76
± 0.22
d [G11a]
| |
eccentricity es: |
0.2494
± 0.0021
[G11a]
| |
inclination is: | 144.42° ± 0.35° [G11a] | |
ascending node Ωs: | 54.22° ± 0.69° [G11a] | |
argument of pericenter ωs: | 20.1° ± 1° [G11a] | |
mean anomaly M: | 296.2° ± 1.1° [G11a] | |
Epoch: | 2001 Mar 31.5 | |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
5.8
[MPC]
6.00 ± 0.13 [V14a]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
220
± 41/44
km [V14a]
| |
geometric albedo: |
0.145
± 0.086/0.045
[V14a]
| |
color index U-B: |
?
| |
color index B-V: |
1.01
[O03b]
| |
color index V-R: | 0.61 ± 0.04 [O03b] | |
color index B-R: | 1.62 [O03b] | |
color index V-I: | 1.25 [O03b] | |
taxonomic type: |
?
| |
mass m: |
2.44x1018
± 3.2x1016
kg [G11a]
| |
density ρ: |
0.6
± 0.36/0.33
g/cm3[V14a]
| |
Hill radius rH: |
470000 km [*D]
|
other data, primary:
|
diameter dp: |
178
± 33/36
km [V14a]
| |
color index V-I: | 0.82 ± 0.04 [B08d] | |
rotation period RPp: |
9.505
± 0.001
h [O03b]
| |
amplitude in mag., rotational ΔM: |
0.31
± 0.05
[T14a]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
129
± 24/26
km [V14a]
| |
diameter ratio ds/dp: |
0.724
± 0.067
[N08c]
| |
component mag. difference ΔM: |
0.8
[O03b]
| |
color index B-R: | 1.61 [O03b] | |
color index V-I: | 0.81± 0.05 [B08d] | |
rotation period RPs: |
9.50
± 0.02
h [K06a]
| |
|
|
--
(88611) Teharonhiawako and Sawiskera
--discovery and notes:
Primary discovered
2001 Aug 20
from
Cerro Tololo Observatory, La Serena, Chile
by
Deep Ecliptic Survey.
Alternate designation(s):
2001 QT297
.
Linked to prediscovery observations from 2000 Aug 01.
Permanent number assigned 2004 Aug 30.
Named 2007 Apr 02 for the mythological Iroquois farmer [MPC59388].
Companion discovered
2001 Oct 11
using
imaging
observations.
Announced
2001 Oct 15.
Permanent designation I Sawiskera, assigned 2007 Apr 02; named for the mythological Iroquois hunter [*].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Grundy, W. M., Noll, K. S., Nimmo, F., Roe, H. G., Buie, M. W., Porter, S. B., Benecchi, S. D., Stephens, D. C., Levison, H. F., & Stansberry, J. A. 2011, Icarus Five new and three improved mutual orbits of transneptunian binaries
- Green, D. W. E. 2007, International Astronomical Union Circular (88611) Teharonhiawako I (Sawiskera)
- Kern, Susan Diane 2006, Ph.D. Thesis A study of binary Kuiper belt objects
- Osip, David J., Kern, S. D., & Elliot, J. L. 2003, Earth Moon and Planets Physical Characterization of the Binary Edgeworth-Kuiper Belt Object 2001 QT<SUB>297</SUB>
- 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, C., Sheppard, S. S., Fernandez, Y. R., Buie, M., Kern, S. D., Buie, M. W., Wasserman, L. H., Elliot, J. L., & Marsden, B. G. 2002, Minor Planet Circulars 2001 QT297
- Millis, R. L., Wasserman, L. H., Buie, M. W., Ryan, E. L., Kern, S. D., Elliot, J. L., Washburn, K. E., & Marsden, B. G. 2001, Minor Planet Electronic Circ., 2001-T38 (2001). 2001 QO297
- Elliot, J. L., Kern, S. D., Osip, D. J., & Burles, S. M. 2001, International Astronomical Union Circular 2001 QT_297
©
2001-2012, 2014
by Wm. Robert Johnston.
Last modified
20 September 2014.
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