170 Maria
Maria (minor planet designation: 170 Maria) is a Main belt asteroid that was discovered by French astronomer Henri Joseph Perrotin on January 10, 1877. Its orbit was computed by Antonio Abetti, and the asteroid was named after his sister, Maria. This is the namesake of the Maria asteroid family; one of the first asteroid families to be identified by Japanese astronomer Kiyotsugu Hirayama in 1918.
Asteroid Maria passing near a cluster of galaxies as seen by a four inch telescope over a period of nearly two hours. | |
| Discovery | |
|---|---|
| Discovered by | J. Perrotin |
| Discovery date | 10 January 1877 |
| Designations | |
MPC designation | (170) Maria |
| Pronunciation | /məˈriːə/ mə-REE-ə |
Alternative designations | A877 AA; 1958 AC |
Minor planet category | Main belt (Maria) |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 116.69 yr (42622 d) |
| Aphelion | 2.7161 AU (406.32 Gm) |
| Perihelion | 2.3923 AU (357.88 Gm) |
Semi-major axis | 2.5542 AU (382.10 Gm) |
| Eccentricity | 0.063388 |
Orbital period (sidereal) | 4.08 yr (1491.0 d) |
Mean anomaly | 88.062° |
Mean motion | 0° 14m 29.184s / day |
| Inclination | 14.377° |
Longitude of ascending node | 301.34° |
| 159.21° | |
| Earth MOID | 1.4114 AU (211.14 Gm) |
| Jupiter MOID | 2.39948 AU (358.957 Gm) |
| TJupiter | 3.392 |
| Physical characteristics | |
| Dimensions | 44.30±1.0 km |
Synodic rotation period | 13.120 h (0.5467 d) |
| 0.1579±0.007 | |
| S | |
| 9.39 | |
In the Tholen classification system, this is categorized as a stony S-type asteroid. Observations performed at the Palmer Divide Observatory in Colorado Springs, Colorado during 2007 produced a light curve with a period of 13.120 ± 0.002 hours and a brightness range of 0.21 ± 0.02 in magnitude. Previous measurements from 2000 gave 13.14 and 5.510 hour estimates for the period. Based upon its spectrum, it is classified as an S-type asteroid.
An occultation of a star by Maria was observed from Manitoba, Canada, on June 10, 1997.