(488) Kreusa ( 488 Kreusa according to the catalog of the CMP [2] ) is a rather large asteroid of the main belt .
| (488) Creusa | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | Max Wolf , Luigi Carner |
| Place of discovery | |
| Discovery date | June 26, 1902 |
| Alternative notation | 1902 JG ; 1947 KH; 1977 YD; A901 CA; A905 XA |
| Category | Main ring |
| Orbital characteristics | |
| Age of September 30, 2012 JD 2456200.5 | |
| Eccentricity ( e ) | 0.159601 |
| Semimajor axis ( a ) | 474.089 million km (3.16909 AU ) |
| Perihelion ( q ) | 398.424 million km (2.6633 AU) |
| Aphelion ( Q ) | 549.754 million km (3.67488 AU) |
| Circulation Period ( P ) | 2060.631 days (5.642 g. ) |
| Average orbital speed | 16.624 km / s |
| Inclination ( i ) | 11.52104 ° |
| Longitude node (Ω) | 84.24733 ° |
| Perihelion Argument (ω) | 70.85565 ° |
| Median Anomaly ( M ) | 313.45430 ° |
| physical characteristics | |
| Diameter | 150.13 km |
| Rotation period | 19.26 h |
| Spectral class | C |
| Apparent magnitude | 13.5 m (current) |
| Absolute magnitude | 7.81 m |
| Albedo | 0,0589 |
| Current distance from the sun | 2,796 a. e. |
| Current distance from earth | 3.63 a. e. |
Content
Opening and title
Creusa was discovered on June 26, 1902 by the German astronomer Max Wolf and the Italian astronomer Luigi Carner at the Heidelberg Observatory . When registering the discovery, the object was assigned the designation 1902 JG . Objects 1947 KH , 1977 YD , A901 CA , A905 XA were later discovered , which were subsequently identified as Creusa.
The asteroid was given the name Creus ( dr. Greek Κρέουσα ) - the name of several characters of ancient Greek mythology [3] .
Orbital characteristics
Creus is drawn in the outer part of the Main asteroid belt at an average distance of 3.169 a. e. (474.1 million km) from the Sun. Its orbit has a moderate eccentricity of 0.1596 and an inclination of 11.52 °. Thus, the maximum distance from Creusa to the Sun is 3.675 a. e. (549.7 million km), the minimum - 2.663 a. e. (398.4 million km).
The period of revolution of Creus around the Sun is 5.64 years (2061 days). The next passage of perihelion will take place on June 23, 2013 [4] .
The absolute magnitude of Creusa is 7.81 m . Its visible luster during the synodic period varies between 11.5-14.6 m [5] .
Physical Characteristics
According to data obtained in 1983 using the IRAS space observatory, the average diameter of Creusa is 150.12 ± 6.4 km, and the albedo is 0.0589 ± 0.005 [6] . A 2010 study of the asteroid using the WISE space telescope yielded a value of 150,000 ± 11.326 km for its diameter and 0.0590 ± 0.0224 for the albedo [7] .
According to the classification, Tolin Creus belongs to the spectral class C.
Data on the period of revolution of Creus around its own axis are contradictory. Measurements taken in 1979–1981 at the Table Mountain Observatory showed that Creus completes a complete revolution in no less than 28 hours [8] . In 2000, a group of Italian scientists published a work according to which the circulation period is 6.457 ± 0.009 h [9] . A study of the Creusa spectrum in 2002 at the Sunflower Observatory yielded a value of 19.26 h [10] .
See also
- List of asteroids ( 401-500 )
- Classifications of Minor Planets
Notes
- ↑ JPL Small-Body Database
- ↑ Minor Planet Names: Alphabetical List . IAU Minor Planet Center. Archived February 11, 2012.
- ↑ Schmadel, Lutz D. Dictionary of Minor Planet Names . - Fifth Revised and Enlarged Edition. - B. , Heidelberg, N. Y .: Springer, 2003 .-- P. 53. - ISBN 3-540-00238-3 .
- ↑ NASA JPL Small Solar System Bodies Database (488 )
- ↑ AstDys (488) Kreusa Ephemerides unopened (link unavailable) . Department of Mathematics, University of Pisa, Italy. Date of treatment January 3, 2013. Archived January 27, 2013.
- ↑ IRAS Minor Planet Survey (pdf). Phillips Laboratory Technical Report (1992). Date of treatment January 3, 2013. Archived January 26, 2013.
- ↑ JR Masiero et al. Main belt asteroids with WISE / NEOWISE. I. Preliminary albedos and diameters (Eng.) // Astrophysical Journal . - 2011. - Vol. 741 , no. 68 . - P. 1-20 . - DOI : 10.1088 / 0004-637X / 741/2/68 .
- ↑ AW Harris, JW Young. Asteroid lightcurve observations from 1979–1981 (English) // Icarus. - 1989. - Vol. 81 , no. 2 . - P. 314-364 .
- ↑ C. Blancoa, M. Di Martinob, D. Ricciolia. New rotational periods of 18 asteroids (Eng.) // Planetary and Space Science. - 2000. - Vol. 48 , no. 4 . - P. 271–284 .
- ↑ 488 Kreusa (English) . Asteroid Lightcurves from Sunflower Observatory 739 (2011). Date of treatment January 3, 2013. Archived January 27, 2013.