4001 Ptolemaeus
| 13.7[2] | |
4001 Ptolemaeus, provisional designation 1949 PV, is a Florian
Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. In 1991, the International Astronomical Union named the S-type asteroid after Greco-Roman astronomer Ptolemy.[1]
Orbit and classification
Ptolemaeus is a member of the
semi-major axis of 2.29 AU). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic.[2]
The body's observation arc begins with its observations as 1949 QD1 at Lowell Observatory on 24 August 1949, or three weeks after its official discovery observation at Heidelberg.[1] On 24 April 1989, Ptolemaeus approached the asteroid 6 Hebe within 5.5 million kilometers at a relative velocity of 3.7 km/s.[2]
Physical characteristics
In the
spectral type for members of the Flora family.[6]
: 23
Diameter and albedo
According to the survey carried out by the
albedo of 0.392.[4] Based on a generic magnitude-to-diameter conversion, assuming a Flora-type typical albedo of 0.24, the asteroid measures 5.0 kilometers for an absolute magnitude of 13.7.[5]
Rotation period
As of 2018, no rotational
Naming
This
M.P.C. 19335).[7]
References
- ^ a b c d e f "4001 Ptolemaeus (1949 PV)". Minor Planet Center. Retrieved 16 March 2018.
- ^ a b c d e f g "JPL Small-Body Database Browser: 4001 Ptolemaeus (1949 PV)" (2017-05-01 last obs.). Jet Propulsion Laboratory. Retrieved 16 March 2018.
- ^ a b "Asteroid 4001 Ptolemaeus – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 27 October 2019.
- ^ .
- ^ a b "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 12 November 2017.
- ^ ISBN 9780816532131.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 16 March 2018.
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
- 4001 Ptolemaeus at AstDyS-2, Asteroids—Dynamic Site
- 4001 Ptolemaeus at the JPL Small-Body Database
