| Minorplanet: | yes |
| Background: |
|
| 109 Felicitas | |
| Discovered: | 9 October 1869 |
| Mpc Name: | (109) Felicitas |
| Alt Names: | A869 TA; 1911 HA |
| Pronounced: | [1] |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 2.6968AU |
| Perihelion: | 1.89658AU |
| Aphelion: | 3.4971abbr=onNaNabbr=on |
| Eccentricity: | 0.29674 |
| Period: | 4.43 yr (1617.6 d) |
| Inclination: | 7.8813° |
| Asc Node: | 3.1617° |
| Arg Peri: | 56.392° |
| Avg Speed: | 17.73 km/s |
| Dimensions: | 88.971 km |
| Mass: | 7.5 kg |
| Surface Grav: | 0.0250 m/s2 |
| Escape Velocity: | 0.0473 km/s |
| Rotation: | 13.191abbr=onNaNabbr=on |
| Spectral Type: | GC (Tholen) |
| Abs Magnitude: | 8.75, 8.759 |
| Albedo: | 0.07 ± 0.02 |
| Mean Motion: | / day |
| Observation Arc: | 146.39 yr (53470 d) |
| Uncertainty: | 0 |
| Moid: | 0.920053AU |
| Jupiter Moid: | 1.95452AU |
| Tisserand: | 3.291 |
109 Felicitas is a dark and fairly large main-belt asteroid. It was discovered by German-American astronomer C. H. F. Peters on October 9, 1869, and named after Felicitas, the Roman goddess of success. The only observed stellar occultation by Felicitas is one from Japan (March 29, 2003).[2]
This body is orbiting the Sun with a period of 4.43 years and an eccentricity (ovalness) of 0.3. Its orbital plane is inclined by 7.9° from the plane of the ecliptic. 109 Felicitas is classified as a carbonaceous GC-type asteroid. It is spinning with a rotation period of 13.2 hours. During 2002, 109 Felicitas was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 89 ± 9 km. This is consistent with the asteroid dimensions computed through other means.