1805 Dirikis

1805 Dirikis

Light-curve-based 3-D model of 1805 Dirikis
Discovery [1]
Discovered by L. Chernykh
Discovery site CrAO - Nauchnyj
Discovery date 1 April 1970
Designations
MPC designation 1805 Dirikis
Named after
 Matiss Dirikis
(astronomer)[2]
1970 GD · 1942 EJ
1948 JH · 1948 JM
1950 TU1 · 1953 EL
1955 QL1 · 1959 JP
1962 WP · 1962 XC1
1964 FE
main-belt · Themis [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 64.67 yr (23619 days)
Aphelion 3.4915 AU (522.32 Gm)
Perihelion 2.7893 AU (417.27 Gm)
3.1404 AU (469.80 Gm)
Eccentricity 0.11181
5.57 yr (2032.7 d)
129.38°
0° 10m 37.56s / day
Inclination 2.5158°
78.937°
86.214°
Earth MOID 1.79818 AU (269.004 Gm)
Jupiter MOID 1.4873 AU (222.50 Gm)
Jupiter Tisserand parameter 3.199
Physical characteristics
Dimensions 25.70 km[4]
22.05±1.37 km[5]
28.098±0.238 km[6]
25.57 km (derived)[3]
Mean radius
 12.85 ± 1.35 km
23.0 h (0.96 d)[1][7]
23.4543 h[8]
0.1065[4]
0.145±0.019[5]
0.0893±0.0076[6]
0.0816 (derived)[3]
0.1065 ± 0.026[1]
S [3]
11.4

    1805 Dirikis, provisional designation 1970 GD, is a stony asteroid from the outer region of the asteroid belt, about 26 kilometers in diameter. It was discovered by Russian astronomer Lyudmila Chernykh at the Crimean Astrophysical Observatory in Nauchnyj on 1 April 1970.[9]

    The S-type asteroid belongs to the Themis family. It orbits the Sun at a distance of 2.8–3.5 AU once every 5 years and 7 months (2,032 days). Several observations gave a varying albedo from 0.082 to 0.15. It has a rotation period of about 23 hours, depending on the respective measurements.[7][8]

    The asteroid was named after Matiss A. Dirikis (1923–1993), who was a member of the Astronomical Observatory at the University of Latvia, and chairman of the Latvian branch of the Astronomical–Geodetical Society of the U.S.S.R.. His work on the motion of small Solar System bodies also contributed to the field of theoretical astronomy.[2]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1805 Dirikis (1970 GD)" (2015-06-15 last obs.). Jet Propulsion Laboratory. Retrieved 20 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1805) Dirikis. Springer Berlin Heidelberg. p. 145. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 4 "LCDB Data for (1805) Dirikis". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved November 2015.
    5. 1 2 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
    6. 1 2 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015.
    7. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1805) Dirikis". Geneva Observatory. Retrieved November 2015.
    8. 1 2 Hanus, J.; Broz, M.; Durech, J.; Warner, B. D.; Brinsfield, J.; Durkee, R.; et al. (November 2013). "An anisotropic distribution of spin vectors in asteroid families". Astronomy & Astrophysics 559: 19. arXiv:1309.4296. Bibcode:2013A&A...559A.134H. doi:10.1051/0004-6361/201321993. Retrieved November 2015.
    9. ↑ "1805 Dirikis (1970 GD)". Minor Planet Center. Retrieved November 2015.

    External links


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