Global Information698 Ernestina information
 Modelled shape of Ernestina from its lightcurve | |
| Discovery [1] | |
|---|---|
| Discovered by | J. Helffrich |
| Discovery site | Heidelberg Obs. |
| Discovery date | 5 March 1910 |
| Designations | |
MPC designation | (698) Ernestina |
Named after | Ernst Wolf (son of Max Wolf)[2] |
Alternative designations | A910 ED · A908 WB 1910 JX |
Minor planet category | main-belt [1][3] · (outer)[4] background [5][6][7] |
| Orbital characteristics [3] | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 111.16 yr (40,601 d) |
| Aphelion | 3.1847 AU |
| Perihelion | 2.5490 AU |
Semi-major axis | 2.8669 AU |
| Eccentricity | 0.1109 |
Orbital period (sidereal) | 4.85 yr (1,773 d) |
Mean anomaly | 269.92° |
Mean motion | 0° 12m 10.8s / day |
| Inclination | 11.532° |
Longitude of ascending node | 40.630° |
Argument of perihelion | 98.687° |
| Physical characteristics | |
Mean diameter |
|
Synodic rotation period | 5.0363±0.0005 h[11] |
Pole ecliptic latitude |
|
Geometric albedo |
|
Spectral type |
|
Absolute magnitude (H) |
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698 Ernestina (prov. designation: A910 ED or 1910 JX) is a background asteroid, approximately 27 kilometers (17 miles) in diameter, located in the outer regions of the asteroid belt. It was discovered on 5 March 1910, by German astronomer Joseph Helffrich at the Heidelberg-Königstuhl State Observatory.[1] The presumed carbonaceous C-type asteroid has a rotation period of 5.0 hours. It was named after Ernst Wolf, son of German astronomer and prolific discoverer of minor planets, Max Wolf.[2]
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