Astronomy:1217 Maximiliana
 Maximiliana (marked "1217") near spiral galaxy NGC 521; imaged by K. and P. J. Heider. | |
| Discovery[1] | |
|---|---|
| Discovered by | E. Delporte |
| Discovery site | Uccle Obs. |
| Discovery date | 13 March 1932 |
| Designations | |
| (1217) Maximiliana | |
| Named after | Max Wolf[2] (German astronomer) |
| 1932 EC · 1925 HC 1962 TD | |
| Minor planet category | main-belt · (inner) Erigone[3] · background[4] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 92.59 yr (33,818 days) |
| |{{{apsis}}}|helion}} | 2.7157 AU |
| |{{{apsis}}}|helion}} | 1.9901 AU |
| 2.3529 AU | |
| Eccentricity | 0.1542 |
| Orbital period | 3.61 yr (1,318 days) |
| Mean anomaly | 196.36° |
| Mean motion | 0° 16m 23.16s / day |
| Inclination | 5.1534° |
| Longitude of ascending node | 148.43° |
| 91.464° | |
| Physical characteristics | |
| Mean diameter | 16.81 km (calculated)[3] |
| Rotation period | 3.1987±0.0001 h[lower-alpha 1] |
| Geometric albedo | 0.057 (assumed)[3] |
| C (assumed)[3] | |
| Absolute magnitude (H) | 12.6[3] 12.7[1] |
1217 Maximiliana, provisional designation 1932 EC, is a background asteroid from the inner regions of the asteroid belt, approximately 17 kilometers (11 mi) in diameter. It was discovered on 13 March 1932, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle.[5] The asteroid was named in memory of Max Wolf, a German astronomer and discoverer of asteroids himself, who independently discovered this asteroid.[2]
Orbit and classification
Maximiliana is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4] Based on osculating Keplerian orbital elements, the asteroid has also been classified as a member of the Erigone family (406), a large asteroid family named after 163 Erigone.[3]
It orbits the Sun in the inner asteroid belt at a distance of 2.0–2.7 AU once every 3 years and 7 months (1,318 days; semi-major axis of 2.35 AU). Its orbit has an eccentricity of 0.15 and an inclination of 5° with respect to the ecliptic.[1] The asteroid was first observed as 1925 HC at Heidelberg in April 1925. The body's observation arc begins in May 1925, also at Heidelberg, and almost 8 years prior to its official discovery observation at Uccle.[5]
Naming
This minor planet was named in memory of Max Wolf (1863–1932), who independently discovered this asteroids the night before its official discovery by Delporte. Wolf was a German astronomer, founder and director of the influential Heidelberg Observatory, and a prolific discoverer of minor planets and other astronomical objects himself.[2] The asteroid was named by the discoverer based on a suggestion by Wolf's widow. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 112). Asteroid 827 Wolfiana and the lunar crater Wolf were also named in his honor.[2]
Physical characteristics
Maximiliana is an assumed carbonaceous C-type asteroid.[3] For comparison, members of the Erigone family are typically found to be C- and X-type asteroids.[6]:23
Rotation period
In March 2015, a rotational lightcurve of Maximiliana was obtained from photometric observations by Petr Pravec at Ondřejov Observatory. Lightcurve analysis gave a rotation period of 3.1987 hours with a brightness amplitude of 0.21 magnitude ({{{1}}}).[lower-alpha 1]
Diameter and albedo
Maximiliana has not been observed by any of the space-based telescopes such as the Wide-field Infrared Survey Explorer, the Akari satellite or the Infrared Astronomical Satellite IRAS. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 16.81 kilometers based on an absolute magnitude of 12.6.[3]
Notes
- ↑ 1.0 1.1 Pravec (2015) web: lightcurve plot of (1217) Maximiliana with a rotation period of 3.1987±0.0001 hours and a brightness amplitude of 0.21±0.02 mag. Quality Code of 3-. Summary figures at the LCDB and Pravec, P.; Wolf, M.; Sarounova, L. (2015) (2015) (data sheet)
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 1217 Maximiliana (1932 EC)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001217.
- ↑ 2.0 2.1 2.2 2.3 Schmadel, Lutz D. (2007). "(1217) Maximiliana". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 101. doi:10.1007/978-3-540-29925-7_1218. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 "LCDB Data for (1217) Maximiliana". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1217%7CMaximiliana.
- ↑ 4.0 4.1 "Asteroid 1217 Maximiliana – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1217.
- ↑ 5.0 5.1 "1217 Maximiliana (1932 EC)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1217.
- ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. Bibcode: 2015aste.book..297N.
External links
- 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 (1)-(5000) – Minor Planet Center
- 1217 Maximiliana at AstDyS-2, Asteroids—Dynamic Site
- 1217 Maximiliana at the JPL Small-Body Database
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