Sinope [4] ( dr. Greek. Σινώπη ) is an irregular natural satellite of Jupiter with retrograde motion. It was discovered in July 1914 by the American astronomer Seth Barnes Nicholson at the Lick Observatory [5] . Named after the nymph Sinope from ancient Greek mythology.
| Sinope | |
|---|---|
| Satellite | |
 | |
| Opening | |
| Discoverer | Seth Barnes Nicholson |
| opening date | July 21, 1914 |
| Orbital characteristics | |
| Periapsid | 18,237,600 km |
| Apoapsid | 30 191 200 km |
| The average radius of the orbit ( r ) | 23 540 000 km [1] |
| Orbital eccentricity ( e ) | 0.25 [1] |
| Sidereal circulation period | 724.1 d (1.95 years ) [1] |
| Orbital Speed ( v ) | 2,252 km / s |
| Inclination ( i ) | 128.11 ° (to the ecliptic ) 153.12 ° (to the equator of Jupiter) [1] |
| Whose companion | Jupiter |
| physical characteristics | |
| Average radius | ≈19 km [2] [3] |
| Volume ( V ) | ≈28,700 km³ |
| Weight ( m ) | 7.5⋅10 16 kg |
| Average Density ( ρ ) | 2.6 g / cm³ (estimated) [2] |
| Acceleration of gravity at the equator ( g ) | 0.014 m / s² (0.001 g) |
| Second cosmic velocity ( v 2 ) | ≈0.023 km / s |
| Albedo | 0.04 (estimated) [2] [3] |
| Temperature | |
| On a surface | ≈124 K |
The satellite got its name in 1975 [6] , before that only the designation Jupiter IX was used . In the period from 1955 to 1975, the satellite was sometimes called " Hades " [7] .
Sinope was the outermost known satellite of Jupiter until the discovery in 1999 and 2000 of 12 satellites of the planet, two of which can be further from Sinope [4] .
Notes
- ↑ 1 2 3 4 Jacobson, RA The Orbits of the Outer Jovian Satellites // The Astronomical Journal . - IOP Publishing , 2000. - Vol. 120 . - P. 2679-2686 . - DOI : 10.1086 / 316817 .
- ↑ 1 2 3 Planetary Satellite Physical Parameters . JPL (Solar System Dynamics) (October 24, 2008). Date of treatment December 12, 2008. Archived January 18, 2010.
- ↑ 1 2 Sheppard, SS; Jewitt, DC; An Abundant Population of Small Irregular Satellites Around Jupiter , Nature, Vol. 423 (May 2003), pp. 261-263
- ↑ 1 2 V.S. Ural. Sinope . - An article on Sinope in the GAISh informational directory. Date of treatment April 30, 2009. Archived March 30, 2012.
- ↑ Nicholson, SB Discovery of the Ninth Satellite of Jupiter (Eng.) // Publications of the Astronomical Society of the Pacific . - 1914. - Vol. 26 . - P. 197-198 . - DOI : 10.1086 / 122336 .
- ↑ Circular No. 2846 of the International Astronomical Union: Satellites of Jupiter (Link unavailable - history ) . October 7, 1974
- ↑ Payne-Gaposchkin, Cecilia. Introduction to Astronomy. - Englewood Cliffs, NJ: Prentice-Hall, 1970 .-- ISBN 0-134-78107-4 .
Links
- Carme Profile ( inaccessible link) . Archived on June 8, 2007. by NASA's Solar System Exploration
- David Jewitt pages .
- Famous moons of Jupiter (eng.) (Inaccessible link) . Archived December 6, 2008. (Scott Sheppard)