(69230) Hermes
compiled by Wm. Robert Johnston
last updated 1 September 2005
Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):
orbital data, primary (osculating elements) [JPL]:
|
semimajor axis a: |
1.65493322531459 AU
| |
orbital period P: |
2.129 y (=777.6 d)
| |
eccentricity e: |
0.624032840749488
| |
perihelion distance q: |
0.622200543470814 AU
| |
aphelion distance Q: |
2.68766591 AU
| |
inclination i: |
6.06800927112482°
| |
argument of perihelion omega: |
92.4021883542106°
| |
ascending node OMEGA: |
34.5124596889444°
| |
mean anomaly M: |
186.987685274742°
| |
perihelion passage TP: |
2006-02-07.7176897
| |
Epoch: |
30 JAN 2005
| |
data arc: |
1937-2003 (717 obs.)
|
orbital data, secondary:
|
semimajor axis a: |
(1.0 km?) [I8227]
| |
semimajor axis/primary radius a/Rp: |
(2.5)
| |
orbital period P: |
13.892 ± 0.006 h [I8233]
| |
eccentricity e: |
?
| |
other data, primary:
|
diameter: |
0.4 km [I8227]
| |
absolute magnitude H: |
17.55 ± 0.10 [I8233]
| |
rotation period: |
13.892 ± 0.006 h? [I8233]
| |
amplitude delta M: |
?
| |
color index B-V: |
?
| |
color index V-R: |
?
| |
color index R-I: |
?
| |
slope parameter G: |
(0.15) [a]
| |
geometric albedo: |
?
| |
mass: |
?
| |
density: |
?
| |
type: |
?
|
other data, secondary:
|
diameter: |
0.4 km [I8227]
| |
diameter ratio Ds/Dp: |
1.0 [I8227]
| |
component magnitude difference: |
(0.0)
| |
rotation period: |
13.892 ± 0.006 h? [I8233]
|
|
--(69230) Hermes--discovery and notes:
Primary discovered 28 October 1937 by K. Reinmuth from Heidelberg-Konigstuhl. Alternate designation 1937 UB.
Companion discovered from radar observations made 18-20 October 2003 by J. L. Margot, M. C. Nolan, V. Negron, A. A. Hine, D. B. Campbell, E. S. Howell, L. A. M. Benner, S. J. Ostro, J. D. Giorgini, and B. G. Marsden from Arecibo Observatory.
Hermes passed only 741,000 km from the Earth on 30 October 1937. Discovered and only briefly observed during this close approach, it was lost until 2003. On 26 April 1942 it made an unobserved close approach, passing 634,000 km from the Earth and 366,000 km from the Moon. Recovery in October 2003 just preceded a close approach of 7,157,000 km on 4 November 2003.
See more information and links at Asteroid/Comet Connection Catchall Catalog page
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Rivkin, A. S., Binzel, R. P., Sunshine, J., Bus, S. J., Burbine, T. H., &
Saxena, A. 2004, Icarus Infrared spectroscopic observations of 69230
Hermes (1937 UB): possible unweathered endmember among ordinary chondrite
analogs
- Povenmire, H. 2004, Lunar and Planetary Institute Conference Abstracts
Hermes, Asteroid 2002 SY50 and the Northern Cetids — No Link Found!
- Hollis, A. J. 2004, Journal of the British Astronomical Association Minor
planet Hermes recovered
- Pravec, P., Kusnirak, P., Warner, B., Behrend, R., Harris, A. W., Oksanen, A., Higgins, D., Roy, R., Rinner, C., Demeautis, C., van den Abbeel, F., Klotz, A., Waelchli, N., Alderweireldt, T., Cotrez, V., & Brunetto, L. 2003, International Astronomical Union Circular 1937 ub (Hermes).
- Margot, J. L., Nolan, M. C., Negron, V., Hine, A. A., Campbell, D. B., Howell, E. S., Benner, L. A. M., Ostro, S. J., Giorgini, J. D., & Marsden, B. G. 2003, International Astronomical Union Circular 1937 ub (Hermes).
- Rivkin, A. S. & Binzel, R. P. 2003, International Astronomical Union Circular 1937 ub (HERMES).
- Skiff, B. A., Young, J., & Spahr, T. 2003, International Astronomical Union Circular 1937 ub (Hermes).
- Kaster, Katherine P. 1938, Publications of the Astronomical Society of the Pacific Orbit Determination of Hermes (1937 UB) Based on Distances Derived from Parallax Methods
- Beard, D. M. 1938, Publications of the Astronomical Society of the Pacific A New Method of Determining the Distance in Case of Great Circle Motion Close to the Earth, with Application to the Reinmuth Object, 1937 UB, Hermes (Abstract)
- Kaster, Katherine P. 1938, Publications of the Astronomical Society of the Pacific Orbit Determination of Hermes (1937 UB) Based on Distances Derived from Parallax Methods (Abstract)
- Mohorovičić, Stjepan 1938, Astronomische Nachrichten Der Durchmesser des Objektes Reinmuth 1937 UB Hermes
- Stobbe, J. 1938, Astronomische Nachrichten Bemerkungen über Helligkeit und Durchmesser von Hermes (1937 UB)
- Jeffers, H. M. 1938, Publications of the Astronomical Society of the Pacific Reinmuth Object, 1937 UB
- 1938, Astronomische Nachrichten Reinmuthsches Objekt 1937 UB
- Kobold, Hermann Albert 1938, Astronomische Nachrichten Planet Hermes (1937 UB)
- 1938, Astronomische Nachrichten Rechen-Institut: Planet 1937 UB
- Gondolatsch, F. 1938, Astronomische Nachrichten Neue Elemente des Objektes Reinmuth 1937 UB
- Gondolatsch, F. 1938, Astronomische Nachrichten Objekt Reinmuth 1937 UB
- Gondolatsch, F. 1938, Astronomische Nachrichten Elemente des Planeten 1937 UB Hermes
- Stobbe, Joachim 1938, Veroeffentlichungen der Universitaets-Sternwarte Kiel Bemerkungen uber Helligkeit und Durchmesser von Hermes (1937 UB) / J. Stobbe
- Gondolatsch, F. 1938, Die Sterne Die Begegnung des Kleinen Planeten 1937 UB (Objekt Reinmuth) MIT der Erde
- Kobold, H. A. & Schewick 1937, International Astronomical Union Circular Object Reinmuth
© 2002-2004, 2005 by Wm. Robert Johnston.
Last modified 1 September 2005.
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