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]

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
MPC designation	(1217) Maximiliana
Named after	Max Wolf[2] (German astronomer)
Alternative designations	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)
Aphelion	2.7157 AU
Perihelion	1.9901 AU
Semi-major axis	2.3529 AU
Eccentricity	0.1542
Orbital period (sidereal)	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°
Argument of perihelion	91.464°
Physical characteristics
Mean diameter	16.81 km (calculated)[3]
Synodic rotation period	3.1987±0.0001 h[lower-alpha 1]
Geometric albedo	0.057 (assumed)[3]
Spectral type	C (assumed)[3]
Absolute magnitude (H)	12.6[3] 12.7[1]

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 (U=3-).[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

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• 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
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1217 Maximiliana at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

[de] (1217) Maximiliana

[es] (1217) Maximiliana

[ru] (1217) Максимилиана