(363 × 249 × 191) ±5 km (MPCD) or
(374 × 248 × 194) ±5 km (ADAM)
Mean diameter
271±5 km (MPCD) or 274±5 km (ADAM)
Volume
(10.5±0.2)×107 km3 (MPCD) or (10.8±0.2)×107 km3 (ADAM)
Mass
(14.76±0.06)×1018 kg[4] (14.6±0.1)×1018 kg[5]
Mean density
1.378±0.045 g/cm3[citation needed]
Synodic rotation period
0.2160 d (5.183641±0.000039 h)
North pole right ascension
14.3°±5°
North pole declination
+83.5°±5°
Pole ecliptic latitude
+64.2°±5°
Pole ecliptic longitude
75.3°±5°
Geometric albedo
0.0435 [6]
Spectral type
X [7]
Absolute magnitude (H)
6.94
Sylvia (minor planet designation: 87 Sylvia) is one of the largest asteroids (approximately tied for 7th place, to within measurement uncertainties). It is the parent body of the Sylvia family and member of Cybele group located beyond the main asteroid belt (see minor-planet groups). Sylvia was the first asteroid known to possess more than one moon.
^Noah Webster (1884) A Practical Dictionary of the English Language
^JPL data Retrieved 2021-09-29
^Carry et al. (2021) 'Evidence for differentiation of the most primitive small bodies'. Astronomy & Astrophysics, in press.
^F. Marchis; et al. (2005). "Discovery of the triple asteroidal system 87 Sylvia" (PDF). Nature. 436 (7052): 822–4. Bibcode:2005Natur.436..822M. doi:10.1038/nature04018. PMID 16094362. S2CID 4412813.
^Margot and Brown (2001), from Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. Archived from the original on 2 July 2013. Retrieved 5 December 2008.
^Supplemental IRAS Minor Planet Survey Archived 2009-08-17 at the Wayback Machine
^PDS spectral class data Archived 2009-08-05 at the Wayback Machine
Sylvia (minor planet designation: 87Sylvia) is one of the largest asteroids (approximately tied for 7th place, to within measurement uncertainties)....
gasoline rating 87Sylvia, a large asteroid Tatra 87, a luxury car All pages with titles containing 87 List of highways numbered 87 This disambiguation...
Look up sylvia in Wiktionary, the free dictionary. Sylvia may refer to: Sylvia (given name) Sylvia (singer), American country music and country pop singer...
and those in the F Ring Occasionally asteroid moons, such as those of 87Sylvia Flashes seen near Jupiter's moon Amalthea that is likely debris ejected...
third-largest asteroid with an accurately measured mass, because it has moons, is 87Sylvia at (14.76±0.06)×1018 kg. Other large asteroids with masses measured from...
1990s confirmed that some asteroids have natural satellites; indeed, 87Sylvia has two. Some, such as 90 Antiope, are double asteroids with two comparably...
orbiting it. It was also the second triple asteroid to be discovered, after 87Sylvia. Eugenia was discovered on 27 June 1857 by the Franco-German amateur astronomer...
Sylvia Marie Likens (January 3, 1949 – October 26, 1965) was an American teenager who was tortured and murdered by her caregiver, Gertrude Baniszewski...
Patricio (16 July 2012). "Orbits, Masses, and Evolution of Main Belt Triple (87) Sylvia". The Astronomical Journal. 144 (2): 70. arXiv:1206.5755. Bibcode:2012AJ...
observed moon of 87Sylvia, discovered in 2001, was at first designated S/2001 (87) 1, later receiving its permanent designation of (87) Sylvia I Romulus. Where...
convention has been extended to natural satellites of minor planets, such as (87) Sylvia I Romulus. The outer irregular satellites of Jupiter (VI through XII)...
Sylvia Lim Swee Lian (simplified Chinese: 林瑞莲; traditional Chinese: 林瑞蓮; pinyin: Lín Ruìlián; Pe̍h-ōe-jī: Lîm Sūi-liân; born 28 March 1965) is a Singaporean...
Ceres and 2 Pallas in the middle zone, and 10 Hygiea in the outer zone. 87Sylvia is probably the largest Main Belt asteroid beyond the outer zone. Orbital...
orbital period of Pallas, 1684.869 days, and 4332.59 days for Jupiter. 87Sylvia is the first asteroid discovered to have more than one moon. This resonance...
telescopes equipped with adaptive optics systems (45 Eugenia, 90 Antiope, 87Sylvia and 121 Hermione). Up to 50% of the interior volume of Mathilde consists...
Estelle Sylvia Pankhurst (5 May 1882 – 27 September 1960) was an English feminist and socialist activist and writer. Following encounters with women-led...
Egyptian goddess Isis) 87Sylvia (Sylvie Petiaux-Hugo Flammarion, first wife of the astronomer Camille Flammarion; also Rhea Sylvia, the mythical mother...
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