Animation of Milianleo from Tzec Maun
|Discovered by||E. Schwab|
|Discovery site||Tzec Maun Obs. (H10)|
|Discovery date||19 February 2009|
|MPC designation||(216433) Milianleo|
|Milian Leo Schwab (discoverer's son)|
|2009 DM3 · 2000 GE16|
|main-belt · (middle)|
|Orbital characteristics |
|Epoch 4 September 2017 (JD 2458000.5)|
|Uncertainty parameter 0|
|Observation arc||16.71 yr (6,105 days)|
|4.54 yr (1,658 days)|
|0° 13m 1.56s / day|
|Dimensions||2.0 km (est. at 0.1)|
216433 Milianleo, provisional designation 2009 DM3, is an asteroid from the middle region of the asteroid belt, approximately 2 kilometers in diameter. It was discovered 19 February 2009, by German amateur astronomer Erwin Schwab using a remote-controlled telescope at Tzec Maun Observatory in New Mexico, United States. The asteroid was named after the discoverer's son, Milian Leo Schwab.
Orbit and classification
Milianleo orbits the Sun in the central main-belt at a distance of 2.4–3.1 AU once every 4 years and 6 months (1,658 days). Its orbit has an eccentricity of 0.13 and an inclination of 3° with respect to the ecliptic. It was first observed as 2000 GE16 at Lincoln Laboratory ETS in 2000, extending the body's observation arc by 9 years prior to its official discovery at Tzec Maun.
Based on a generic absolute magnitude to diameter conversion, Milianleo measures approximately 2 kilometers in diameter, assuming an albedo of 0.10. As of 2017, its spectral type as well as its rotation period and shape remain unknown.
This minor planet was named after Milian Leo Schwab, the first-born son of German amateur astronomer and discoverer Erwin Schwab. The approved naming citation was published by the Minor Planet Center 4 October 2009 (M.P.C. 67220).
- Cloudcroft Observatory, owned by the Tzec Maun Foundation
- "JPL Small-Body Database Browser: 216433 Milianleo (2009 DM3)" (2016-12-22 last obs.). Jet Propulsion Laboratory. Retrieved 5 July 2017.
- "216433 Milianleo (2009 DM3)". Minor Planet Center. Retrieved 9 March 2017.
- "Conversion of Absolute Magnitude to Diameter for Minor Planets". Sephen F. Austin State University. Dan Burton. Archived from the original on 23 July 2011. Retrieved 26 November 2013.
- "LCDB Data for (216433) Milianleo". Asteroid Lightcurve Database (LCDB). Retrieved 5 July 2017.
- "Kleinplaneten Entdecker Erwin Schwab" [Minor-planet discoveries by Erwin Schwab at the Tzec Maun Observatories]. Erwin Schwab. Retrieved 23 August 2016.
- "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 9 March 2017.
- Asteroid Milianleo, Erwin Schwab
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (215001)-(220000) – Minor Planet Center
- 216433 Milianleo at the JPL Small-Body Database