19 Fortuna
19 Fortuna is one of the biggest main belt asteroids. It is made up of material similar to 1 Ceres: a dark colored surface that is heavily space weathered and m
 | |
| Discovery | |
|---|---|
| Discovered by | John Russell Hind |
| Discovery date | August 22, 1852 |
| Designations | |
| A902 UG | |
| Main belt | |
| Orbital characteristics | |
| Epoch October 22, 2004 (JD 2453300.5) | |
| Aphelion | 423.443 Gm (2.831 AU) |
| Perihelion | 307.028 Gm (2.052 AU) |
| 365.235 Gm (2.441 AU) | |
| Eccentricity | 0.159 |
| 1393.378 d (3.81 a) | |
Average orbital speed | 18.94 km/s |
| 268.398° | |
| Inclination | 1.573° |
| 211.379° | |
| 182.091° | |
| Physical characteristics | |
| Dimensions | 225.0 km[1] |
| Mass | ~1.2×1019 kg |
Mean density | 2.0? g/cm³ |
| ~0.0629 m/s² | |
| ~0.1190 km/s | |
| 0.3101 d (7.445 h) | |
| Albedo | 0.037 |
| Temperature | ~180 K |
Spectral type | G |
| 8.88 to 12.95 | |
| 7.13 | |
| 0.25" to 0.072" | |
19 Fortuna is one of the biggest main belt asteroids. It is made up of material similar to 1 Ceres: a dark colored surface that is heavily space weathered and made up of primitive organic compounds, including tholins.
Fortuna is 225 km in diameter and has one of the darkest known geometric albedos for an asteroid over 150 km in diameter. The albedo for it has been measured at 0.028 and 0.037.[2]
The Hubble Space Telescope saw Fortuna in 1993. It was resolved with an apparent diameter of 0.20 arcseconds (4.5 pixels in the Planetary Camera) and its shape was found to be nearly spherical. Moons were searched for but none were detected. [3]
Stellar occultations by Fortuna have been seen several times.
It was found by J. R. Hind on August 22, 1852 and named after Fortuna, the Roman goddess of luck.
References
- ↑ "Imaging Observations of Asteroids with Hubble Space Telescope" (PDF). Archived from the original (PDF) on 2008-10-30. Retrieved 2005-01-15.
- ↑ "A closer look at main belt asteroids 1: WF/PC images (Icarus 173)" (PDF). Retrieved 2007-09-23.
- ↑ Blanco, C.; Di Martino, M.; Dotto, E.; Gilmore, A. C.; Kilmartin, P. M.; Riccioli, D. (1996-02-01). "Earth-bound observations of asteroid 19 Fortuna as support to HST imaging: lightcurves, pole direction and shape". Planetary and Space Science. 44 (2): 87–91. doi:10.1016/0032-0633(95)00079-8. ISSN 0032-0633.
Other websites
- Orbital simulation from JPL (Java) / Ephemeris
Content Disclaimer
Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.
- The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
- There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
- It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
- Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
- Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.