Back 10 Hygiea Afrikaans (10) Hygiea ALS 10 هيجيا Arabic 10 هيجيا (كويكب) ARZ 10 Hygiea AST (10) Гігея Byelorussian 10 Хигия Bulgarian (10) Hygiea Breton (10) Higiea Catalan (10) Гигея CE

10 Hygiea

10 Hygiea
VLT-SPHERE image of Hygiea
Discovery[1]
Discovered byA. de Gasparis
Discovery siteAstronomical Observatory of Capodimonte
Discovery date12 April 1849
Designations
(10) Hygiea
Pronunciation/haɪˈdʒiːə/[2]
Named after
Hygieia[3]
A900 GA
Main belt (Hygiea family)
AdjectivesHygiean /haɪˈdʒiːən/[4]
SymbolA zeta-shaped serpent crowned with a star (historical astronomical), ⯚ (modern astrological)
Orbital characteristics[1]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc170.23 yr (62,175 days)
Aphelion3.4948 AU
Perihelion2.7882 AU
3.1415 AU
Eccentricity0.1125
5.57 yr (2033.8 days)
16.76 km/s
152.18°
Inclination3.8316°
283.20°
312.32°
Proper orbital elements[5]
3.14178 AU
0.1356
5.1039°
64.6218 deg / yr
5.57088 yr
(2034.762 d)
Precession of perihelion
128.544 arcsec / yr
Precession of the ascending node
−96.9024 arcsec / yr
Physical characteristics
Dimensions450 km × 430 km × 424 km
± 10 km × 10 km × 20 km
433±8 km[6]
434±14 km[7]
Flattening0.06[a]
Mass(8.74±0.69)×1019 kg[6]
(8.32±0.80)×1019 kg (representative)[8]
Mean density
2.06±0.20 g/cm3[6]
1.94±0.19 g/cm3[8]
13.82559±0.00005 h[7]
0.063[6]
0.0717±0.002[1]
Temperature≈164 K
max: 247 K (−26°C)[9]
C-type[1]
9.0[10] to 11.97
5.64[1]
0.321″ to 0.133″

10 Hygiea is a major asteroid located in the main asteroid belt. With a mean diameter of between 425 and 440 km and a mass estimated to be 3% of the total mass of the belt,[11] it is the fourth-largest asteroid in the Solar System by both volume and mass, and is the largest of the C-type asteroids (dark asteroids with a carbonaceous surface) in classifications that use G type for 1 Ceres. It is very close to spherical, apparently because it had re-accreted after the disruptive impact that produced the large Hygiean family of asteroids.

  1. ^ a b c d e Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ "Hygeia". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  3. ^ Cite error: The named reference springer was invoked but never defined (see the help page).
  4. ^ "hygeian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  5. ^ Cite error: The named reference Hygiea-POE was invoked but never defined (see the help page).
  6. ^ 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
  7. ^ a b Cite error: The named reference Vernazza2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Vernazza2019b was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Lim2005 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference AstDys-Hygiea was invoked but never defined (see the help page).
  11. ^ "Mass of 10 Hygiea" 0.445 / "Mass of Mbelt" Archived 2008-10-31 at the Wayback Machine 15 = 0.0296


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