5011 Ptah
| Discovery LD | |
|---|---|
| Physical characteristics | |
Mean diameter | 1.56 km (calculated)[5] |
| 0.20 (assumed)[5] | |
| Q [5][6] | |
| 16.4[1][5] | |
5011 Ptah (potentially hazardous asteroid of the Apollo group. It was discovered by astronomers with the Palomar–Leiden survey on 24 September 1960. The rare O-type asteroid on an eccentric orbit measures approximately 1.6 kilometers (1 mile) in diameter. It was named after the Ancient Egyptian deity Ptah.
Discovery
Ptah was discovered on 24 September 1960, by Dutch astronomers
Cornelis van Houten at Leiden, on photographic plates taken by Dutch–American astronomer Tom Gehrels at the Palomar Observatory in California.[4] On the same night, the trio of astronomers also discovered the minor planets 1912 Anubis, 1923 Osiris and 1924 Horus, which were also named after Ancient Egyptian deities
.
Palomar–Leiden survey
The
survey designation "P-L" stands for Palomar–Leiden, named after Palomar Observatory and Leiden Observatory, which collaborated on the fruitful Palomar–Leiden survey in the 1960s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Ingrid and Cornelis van Houten at Leiden Observatory where astrometry was carried out. The trio are credited with the discovery of several thousand minor planets.[7]
Naming
This
Classification and orbit
Ptah orbits the Sun at a distance of 0.8–2.5
precoveries were taken, the asteroid's observation arc begins with its official discovery observation at Palomar.[4]
The
Mars-crosser
.
Physical characteristics
According to the "ExploreNEOs" Warm Spitzer program, Ptah is a rare Q-type asteroid, that belongs to the broader S-group of asteroids.[6]
The Collaborative Asteroid Lightcurve Link assumes a standard
References
- ^ a b c d e f g "JPL Small-Body Database Browser: 5011 Ptah (6743 P-L)" (2016-08-20 last obs.). Jet Propulsion Laboratory. Retrieved 4 July 2017.
- ^ "Ptah". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 22 March 2020.
- ^ ISBN 978-3-540-00238-3.
- ^ a b c "5011 Ptah (6743 P-L)". Minor Planet Center. Retrieved 11 August 2016.
- ^ a b c d e "LCDB Data for (5011) Ptah". Asteroid Lightcurve Database (LCDB). Retrieved 11 August 2016.
- ^ S2CID 119278697. Retrieved 11 August 2016.
- ^ "Minor Planet Discoverers". Minor Planet Center. 20 June 2016. Retrieved 10 August 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 11 August 2016.
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
- 5011 Ptah at NeoDyS-2, Near Earth Objects—Dynamic Site
- 5011 Ptah at ESA–space situational awareness
- 5011 Ptah at the JPL Small-Body Database
