Back 8 Flora Afrikaans (8) Flora ALS فلورا 8 Arabic فلورا 8 ARZ 8 Flora AST (8) Flora BAR (8) Флора Byelorussian Флёра (астэроід) BE-X-OLD 8 Флора Bulgarian (8) Flora Catalan
 | |
| Discovery | |
|---|---|
| Discovered by | J.R. Hind |
| Discovery date | 18 October 1847 |
| Designations | |
| (8) Flora | |
| Pronunciation | /ˈflɔːrə/ |
Named after | Flōra |
| Main belt (Flora family) | |
| Adjectives | Florian /ˈflɔːriən/ |
| Symbol | .svg){kind=small} (historical) |
| Orbital characteristics[1] | |
| Epoch 31 March 2024 (JD 2460400.5) | |
| Aphelion | 2.55 AU (381 million km) |
| Perihelion | 1.86 AU (278 million km) |
| 2.20 AU (329 million km) | |
| Eccentricity | 0.15650 |
| 3.27 yr (1192.84 d) | |
| 317.3° | |
| Inclination | 5.889° |
| 110.87° | |
| 1 February 2024 | |
| 285.6° | |
| Earth MOID | 0.87 AU (130 million km) |
| Proper orbital elements[2] | |
Proper semi-major axis | 2.2014 AU |
Proper eccentricity | 0.1449 |
Proper inclination | 5.574° |
Proper mean motion | 110.2 deg / yr |
Proper orbital period | 3.26679 yr (1193.194 d) |
Precession of perihelion | 32.017 arcsec / yr |
Precession of the ascending node | −35.51 arcsec / yr |
| Physical characteristics | |
| Dimensions | 136 km × 136 km × 113 km[3] 145 km × 145 km × 120 km[4] |
| 146±2 km[5] 128 km[3] | |
| Flattening | 0.18[a] |
| Mass | (4±1.6)×1018 kg[5] (6.62±0.84)×1018 kg[b][6] |
Mean density | 2.4±1.0 g/cm3[5] 3.04±1.39 g/cm3[6] |
| 0.533 d (12.799 h)[1] | |
| 0.224 (calculated)[5] 0.226[1] | |
| S[1] | |
| 7.9[7] to 11.6 | |
| 6.61[1] | |
| 0.21" to 0.053" | |
8 Flora is a large, bright main-belt asteroid. It is the innermost large asteroid: no asteroid closer to the Sun has a diameter above 25 kilometres (20% that of Flora), and not until 20-km 149 Medusa was discovered was an asteroid known to orbit at a closer mean distance.[8] It is the seventh-brightest asteroid with a mean opposition magnitude of +8.7.[9] Flora can reach a magnitude of +8.1 at a favorable opposition near perihelion, such as occurred in November 2020 when it was 0.88 AU (132 million km; 340 LD) from Earth.[10]
- ^ a b c d e Cite error: The named reference
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Flora-POEwas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Baerwas invoked but never defined (see the help page). - ^ Cite error: The named reference
Torppa2003was invoked but never defined (see the help page). - ^ a b c d e P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
- ^ a b James Baer, Steven Chesley & Robert Matson (2011) "Astrometric masses of 26 asteroids and observations on asteroid porosity." The Astronomical Journal, Volume 141, Number 5
- ^ Cite error: The named reference
Pasachoff1983was invoked but never defined (see the help page). - ^ Binsel, Richard P.; Gehrels, Tom and Matthews, Mildred Shapley (editors); Asteroids II; published 1989 by University of Arizona Press; pp. 1038-1040. ISBN 0-8165-1123-3
- ^ The Brightest Asteroids (archived)
- ^ Cite error: The named reference
Horizons2020was invoked but never defined (see the help page).
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