| Discovery | |
|---|---|
| Discovered by | Jérôme Eugène Coggia |
| Discovery date | 31 March 1899 |
| Designations | |
| (444) Gyptis | |
| Pronunciation | /ˈdʒɪptɪs/ |
Named after | Gyptis |
| 1899 EL | |
| Main belt | |
| Adjectives | Gyptidian |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 116.54 yr (42568 d) |
| Aphelion | 3.25674 AU (487.201 Gm) |
| Perihelion | 2.28337 AU (341.587 Gm) |
| 2.77005 AU (414.394 Gm) | |
| Eccentricity | 0.17569 |
| 4.61yr (1684.0d) | |
| 11.8852° | |
| 0° 12m 49.615s / day | |
| Inclination | 10.2775° |
| 195.716° | |
| 154.984° | |
| Physical characteristics | |
| Dimensions | 179×150 km[2] |
| 159.331±0.490 km[1] 164.63±2.60 km[3] | |
| Mass | 1.25×1019 kg[4] (1.06±0.28)×1019 kg[3] |
Meandensity | 5.53±1.46 g/cm3[4] 4.55±1.23 g/cm3[3] |
| 6.214 h (0.2589 d)[1] | |
| 0.051±0.008[1] | |
| C[1] | |
| 8.07[1] | |
444 Gyptis is amain-beltasteroid that was discovered byJérôme Eugène Coggia on March 31, 1899, inMarseille. It is classified as aC-type asteroid and is probably composed ofcarbonaceous material. The spectra of the asteroid displays evidence of aqueous alteration.[5]
In 2004, Kochetova estimated Gyptis to have a mass of 1.25×1019 kg with a high density of 5.53 g/cm3.[4] In 2012 Carry estimated the mass as(1.06±0.28)×1019 kg with a high density of4.55±1.23 g/cm3.[3] Theadaptive optics instrument at theW. M. Keck Observatory showed an object with a diameter of 129 km, which is much smaller than the estimate of 160 km from theIRAS observatory measurements, indicating an irregular shape. The size ratio between the major and minor axes is estimated at 1.40.[6] Observations of anoccultation on October 14, 2007, produced sixchords indicating a cross-section ellipsoid of 179×150 km.[2]
Between 1990 and 2021, 444 Gyptis has been observed tooccult 17 stars.
_mathilde.jpg) | This article about a C-type asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
