| Discovery[1] | |
|---|---|
| Discovered by | Joel Hastings Metcalf |
| Discovery site | Taunton, Massachusetts |
| Discovery date | 26 April 1908 |
| Designations | |
| (756) Lilliana | |
| 1908 DC[2] | |
| main belt | |
| Orbital characteristics[2][3] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 101.86 yr (37203 d) |
| Aphelion | 3.66990 AU (549.009 Gm) |
| Perihelion | 2.71910 AU (406.772 Gm) |
| 3.19450 AU (477.890 Gm) | |
| Eccentricity | 0.148819 |
| 5.71 yr (2085.5 d) | |
| 281.138° | |
| 0° 10m 21.446s / day | |
| Inclination | 20.3578° |
| 208.088° | |
| 5.26073° | |
| Physical characteristics | |
| 0.0500±0.002[4] | |
756 Lilliana is aminor planet orbiting theSun that was discovered by American astronomerJoel Hastings Metcalf on 26 April 1908 fromTaunton, Massachusetts. It rotates around itsaxis of rotation every 9.36 hours.[5][clarification needed]
Photometric observations of this asteroid atPalmer Divide Observatory inColorado Springs, Colorado, during 2007 gave alight curve with a period of9.262±0.001 hours and a brightness variation of0.83±0.03 inmagnitude.[7] A 2012 study based upon observations at the Organ Mesa Observatory inLas Cruces, New Mexico, during 2012 produced a conflicting period of7.834±0.001 hours and a brightness variation of0.17±0.02 inmagnitude. Further study will be needed to resolve the discrepancies in period and amplitude.[8]
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