Asteroids with Satellites Database--Johnston's Archive
(79360)
Sila-Nunam
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: |
44.1329 AU
| |
orbital period P: |
293.192 yr
(= 107088.4 d)
| |
eccentricity e: |
0.015946
| |
perihelion distance q: |
43.4292 AU
| |
aphelion distance Q: |
44.8367 AU
| |
inclination i: |
2.23732°
| |
argument of perihelion ω: |
214.91°
| |
ascending node Ω: |
304.32087°
| |
mean anomaly M: |
337.33°
| |
perihelion passage TP: |
2032 Nov 08
| |
Epoch: |
2014 May 23
| |
data arc: |
1997-2014
(244 obs.)
| |
Earth MOID: |
42.4388 AU
| |
Jupiter Tisserand invariant TJ: |
5.937
|
| Neptune Tisserand invariant TN: | 3.10 [*D] |
orbital data, secondary:
|
semimajor axis as: |
2777
± 19 km
[G12a]
| |
separation/primary radius as/rp: | 22 [*D] | |
separation/Hill radius as/rH: | 0.0035 [*D] | |
orbital period Ps: |
12.51
± 0.0000217
d [B14a]
| |
eccentricity es: |
0.018
± 0.006
[B14a]
| |
inclination is: | 103.51° ± 0.39° [G12a] | |
ascending node Ωs: | 140.76° ± 0.66° [G12a] | |
argument of pericenter ωs: | 326° ± 59° [G12a] | |
mean anomaly M: | 16.3° ± 1° [G12a] | |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
5.2
[MPC]
5.56 ± 0.04 [V14a]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
343
± 42
km [V12a]
| |
geometric albedo: |
0.086
± 0.026/0.017
[G12a]
| |
color index U-B: |
0.73
[J07a]
| |
color index B-V: |
1.08
[B05b]
| |
color index V-R: | 0.66 ± 0.04 [B05b] | |
color index B-R: | 1.74 [B05b] | |
color index V-I: | 1.25 ± 0.03 [B05b] | |
color index R-J: | 1.4 [*D] | |
color index V-J: | 2.06 ± 0.03 [B05b] | |
color index J-H: | 0.38 ± 0.08 [D06a] | |
color index V-H: | 2.45 ± 0.08 [B05b] | |
taxonomic type: |
RR (G-mode) [B05b]
| |
mass m: |
1.08x1019
± 2.2x1017
kg [G12a]
| |
density ρ: |
0.72
± 0.37/0.22
g/cm3[G12a]
| |
Hill radius rH: |
790000 km [*D]
|
other data, primary:
|
diameter dp: |
249
± 30/31
km [V14a]
| |
color index V-I: | 1.26 ± 0.04 [B08d] | |
rotation period RPp: |
300.2388
h [T14a]
| |
amplitude in mag., rotational ΔM: |
0.14
± 0.07
[T14a]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
236
± 28/29
km [V14a]
| |
diameter ratio ds/dp: |
0.944
[G12a]
| |
component mag. difference ΔM: |
0.12
[G12b]
| |
color index V-I: | 1.33± 0.05 [B08d] | |
rotation period RPs: |
?
| |
|
|
--
(79360) Sila-Nunam
--discovery and notes:
Primary discovered
1997 Feb 03
from
Mauna Kea Observatory, Hawaii, USA
by
J. X. Luu, D. C. Jewitt, C. A. Trujillo, and J. Chen.
Alternate designation(s):
1997 CS29
.
Permanent number assigned 2004 May 04.
Named 2012 Jan 09 for the mythological Inuit god of the sky [MPC77871].
Companion discovered
2002 Oct 22
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2005 Oct 06.
Permanent designation I Nunam, assigned 2012 Jan 09; named for the mythological Inuit goddess of the earth [MPC77871].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Rabinowitz, David L., Benecchi, Susan D., Grundy, William M., & Verbiscer, Anne J. 2014, Icarus The rotational light curve of (79360) Sila-Nunam, an eclipsing binary in the Kuiper Belt
- Benecchi, S. D., Noll, K. S., Thirouin, A., Ryan, E., Grundy, W. M., Verbiscer, A., Doressoundiram, A., Hestroffer, D., Beaton, R., Rabinowitz, D., & Chanover, N. 2014, Icarus The UT 7/8 February 2013 Sila-Nunam mutual event & future predictions
- Verbiscer, Anne J., Grundy, W., Benecchi, S., Rabinowitz, D., & Skrutskie, M. F. 2013, AAS/Division for Planetary Sciences Meeting Abstracts High Precision Lightcurves of A Mutual Event of Transneptunian Binary (79360) Sila-Nunam From Gemini Observatory
- Benecchi, Susan D., Noll, K., Thirouin, A., Ryan, E., Grundy, W., Verbiscer, A., Doressoundiram, A., Hestroffer, D., Beaton, R., Rabinowitz, D., & Chanover, N. 2013, AAS/Division for Planetary Sciences Meeting Abstracts The UT 8 February 2013 Sila-Nunam Mutual Event & Future Predictions
- Verbiscer, Anne J., Grundy, W. M., Rabinowitz, D. L., Benecchi, S. D., Brucker, M. J., Tourtellotte, S. W., & Wasserman, L. H. 2012, AAS/Division for Planetary Sciences Meeting Abstracts Mutual Events and Photometry of Transneptunian Binary (79360) Sila-Nunam
- Grundy, W. M., Benecchi, S. D., Rabinowitz, D. L., Porter, S. B., Wasserman, L. H., Skiff, B. A., Noll, K. S., Verbiscer, A. J., Buie, M. W., Tourtellotte, S. W., Stephens, D. C., & Levison, H. F. 2012, Icarus Mutual events in the Cold Classical transneptunian binary system Sila and Nunam
- Grundy, W. M., Benecchi, S. D., Buie, M. W., Noll, K. S., Porter, S. B., Roe, H. G., Stansberry, J. A., & Trujillo, C. A. 2011, EPSC-DPS Joint Meeting 2011 A New NOAO Survey Program: Mutual Orbits and Masses of Kuiper Belt Binaries
- Verbiscer, Anne J., Fisher, T. M., & French, R. G. 2010, Bulletin of the American Astronomical Society The Strongest Opposition Surges: Products of Ejecta Exchange?
- Rabinowitz, David L., Schaefer, B., Schaefer, M., & Tourtellotte, S. 2009, AAS/Division for Planetary Sciences Meeting Abstracts #41 Evidence for Recent Resurfacing of the Binary Kuiper Belt Object 1997 CS29
- Grundy, W. M., Buie, M. W., & Spencer, J. R. 2005, The Astronomical Journal Near-Infrared Spectrum of Low-Inclination Classical Kuiper Belt Object (79360) 1997 CS<SUB>29</SUB>
- Taniguchi, M., Sekiguchi, T., Itoh, Y., & Mukai, T. 2004, 35th COSPAR Scientific Assembly Photometry and Spectroscopy of TNOs with the Subaru Telescope
- Barucci, M. A., Romon, J., Doressoundiram, A., & Tholen, D. J. 2000, The Astronomical Journal Compositional Surface Diversity in the Trans-Neptunian Objects
- Barucci, M. A., Romon, J., Le Bras, A., Fulchignoni, M., & Tholen, D. 1999, AAS/Division for Planetary Sciences Meeting Abstracts #31 Broad Band Optical Colors of Trans-Neptunian Objects
- Jewitt, D., Williams, G. V., & Marsden, B. G. 1997, Minor Planet Electronic Circulars 1997 CS29
- Luu, J., Jewitt, D., Trujillo, C., Chen, J., Brown, W. R., Hergenrother, C. W., Spahr, T. B., Offutt, W., & Marsden, B. G. 1997, Minor Planet Electronic Circulars 1997 CS29
©
2005-2012, 2014
by Wm. Robert Johnston.
Last modified
20 September 2014.
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