(762) Pulcova
Asteroid (762) Pulcova |
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Properties of the orbit ( animation ) | |
Orbit type | Outer main belt |
Major semi-axis | 3.1579 AU |
eccentricity | 0.1042 |
Perihelion - aphelion | 2.8289 AU - 3.4869 AU |
Inclination of the orbit plane | 13.079 ° |
Length of the ascending node | 305.698 ° |
Argument of the periapsis | 189.750 ° |
Time of passage of the perihelion | 4th October 2016 |
Sidereal period | 5 a 224.7 d |
Physical Properties | |
Medium diameter | 147.3 ± 0.8 km |
Dimensions | 1.4 ± 0.1 x 10 18 | kg
Albedo | 0.043 ± 0.009 |
Medium density | 0.9 ± 0.1 g / cm³ |
Rotation period | 5 hours 50.4 minutes |
Absolute brightness | 8.28 likes |
Spectral class | F. |
history | |
Explorer | Grigory N. Neujmin |
Date of discovery | September 3, 1913 |
Another name | 1913 SQ, 1952 QM 1 |
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. |
(762) Pulcova is an asteroid located in the main outer belt . It has a moon named S / 2000 (762) 1 .
Discovery and naming
Pulcova was discovered on September 3, 1913 by the Russian astronomer Grigorij Nikolaevič Neujmin at the Crimean Observatory in Simejis on the Crimean Peninsula ( Ukraine ).
The celestial body was named after the Pulkovo Observatory near Saint Petersburg , Russia .
In total, the asteroid has been observed through several earth-based telescopes, a total of 2,456 times within 101 years. (As of Sept. 2017)
Track properties
Orbit
Pulcova orbits the Sun in a prograde , elliptical orbit between 423,197,000 km (2.83 AU ) and 521,640,000 km (3.49 AU) from its center. The orbital eccentricity is 0.104, the web is about 13,08 ° to the ecliptic inclined . Its orbit is therefore in the outer asteroid belt .
The orbit period of Pulcova is 5.61 years.
rotation
Pulcova rotates once around its axis in 5 hours, 50 minutes. It follows that the asteroid 8423.2 in a Pulcova-year own twists performs.
Physical Properties
size
The observations made so far indicate an irregularly shaped body; the most precise determination of the diameter ( geometric mean ) is 147.343 km. The exact dimensions are currently unclear.
Assuming a mean diameter of 147.3 km, the surface area is around 68,200 km 2 , which is slightly less than the area of Georgia .
Provisions of the diameter for Pulcova
year | Dimensions km | source |
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2001 | 137.08 ± 3.20 | Tedesco ( IRAS ) u. a. |
2011 | 141.72 ± 1.54 | Masiero et al. a. |
2014 | 147.343 ± 0.818 | Masiero et al. a. |
The most precise / current determination is marked in bold .
internal structure
Pulcova belongs to the F-type asteroids (according to another classification: C) and therefore has a dark, carbon-rich surface with an albedo of 0.043. The surface color is therefore darker than coal. The unusually low mean density of 0.9 g / cm 3 - which is below the density of water - is an indication that it is not a compact body, but that the asteroid is likely to be a rubble pile , a collection of Dust and rocks that are riddled with cavities. The first estimate of the density was based on 1.8 ± 0.8 g / cm 3 . With this revision due to the discovery of the moon, the estimate of the mass decreased from 2.6 ∙ 10 18 to 1.4 ∙ 10 18 .
moon
On February 22, 2000, a Pulcova's moon was discovered at the Canada-France-Hawaii telescope , which was given the provisional designation S / 2000 (762) 1 . The moon is 19 kilometers in diameter and orbits Pulcova in 4.4 days within Pulcova's Hill radius (26,000 km) at a distance of about 700 km.
The Pulcova system at a glance:
Components | Physical parameters | Path parameters | discovery | |||||
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Surname | Throughput diameter (km) |
Relative size % |
Mass (kg) |
Major semi-axis (km) |
Orbital time (d) |
eccentricity |
Inclination to Pulcova's equator |
Date of discovery Date of publication |
(762) Pulcova |
147.3 | 100.00 | 1.4 ∙ 10 18 | - | - | - | - | September 3, 1913 1913 |
S / 2000 (762) 1 (Pulcova I) |
19.0 | 7.8 | ? | 703 | 4,438 | 0.03 | ? | February 22, 2000 October 26, 2000 |
See also
Web links
- Wm. Robert Johnston: (762) Pulcova (English)
- 762 Pulcova discovery photo of (762) Pulcova and S / 2000 (762) 1 (English)
Individual evidence
- ↑ (762) Pulcova in the Small-Body Database of the Jet Propulsion Laboratory (English).
- ↑ IRAS (2001): The Supplemental IRAS Minor Planet Survey. Retrieved September 19, 2017 .
- ^ Joseph R. Masiero et al: Main Belt Asteroids with WISE / NEOWISE I: Preliminary Albedos and Diameters . September 2011, arxiv : 1109.4096 .
- ^ Joseph R. Masiero et al.: Main-belt Asteroids with WISE / NEOWISE: Near-infrared Albedos . August 2014, bibcode : 2014ApJ ... 791..121M .
- ^ William J. Merline et al: Asteroids Do Have Satellites (2002). (PDF) Retrieved September 19, 2017 .
- ^ William J. Merline et al: Discovery of Companions to Asteroids 762 Pulcova and 90 Antiope by Direct Imaging (June 2000) (PDF). (PDF) Retrieved September 19, 2017 .