(762) Pulcova

Asteroid (762) Pulcova
Properties of the orbit ( animation ) Epoch: 4th September 2017 ( JD 2,458,000.5)
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

The orbit of Pulcova (blue) between the orbits of Mars and Jupiter.

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
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
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 49130000 ♠1913
S / 2000 (762) 1 (Pulcova I)	19.0	7.8	?	703	4,438	0.03	?	February 22, 2000 50001026 ♠October 26, 2000

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 .

[JPL-1] (762) Pulcova in the Small-Body Database of the Jet Propulsion Laboratory (English).

[iras-2] IRAS (2001): The Supplemental IRAS Minor Planet Survey. Retrieved September 19, 2017 .

[masiero2011-3] Joseph R. Masiero et al: Main Belt Asteroids with WISE / NEOWISE I: Preliminary Albedos and Diameters . September 2011, arxiv : 1109.4096 .

[masiero2014-4] Joseph R. Masiero et al.: Main-belt Asteroids with WISE / NEOWISE: Near-infrared Albedos . August 2014, bibcode : 2014ApJ ... 791..121M .

[merline2002-5] William J. Merline et al: Asteroids Do Have Satellites (2002). (PDF) Retrieved September 19, 2017 .

[merline2000-6] 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 .