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1805 Dirikis (1970 GD)
Classification: Main-belt Asteroid          SPK-ID: 2001805
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .110436689826241 1.7329e-08  
a 3.144046990917088 1.0772e-08 au
q 2.796828848582051 5.3148e-08 au
i 2.513959231329803 9.61e-07 deg
node 78.90867994698638 1.7782e-05 deg
peri 87.46113982937032 2.2555e-05 deg
M 121.5949826190753 9.3586e-06 deg
tp 2458708.726998419181
(2019-Aug-13.22699842)
5.2099e-05 TDB
period 2036.254089074993
5.57
1.0464e-05
2.865e-08
d
yr
n .1767952250809411 9.0856e-10 deg/d
Q 3.491265133252125 1.1961e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3422  
   data-arc span      25866 days (70.82 yr)  
   first obs. used      1950-10-15  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41556  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 08:05:05  

Additional Information
 Earth MOID = 1.80613 au 
 Jupiter MOID = 1.48021 au 
 T_jup = 3.199 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.49   n/a MPO636089  
diameter diameter 28.098 km 0.238 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 23.0 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.089   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1805 Dirikis (1970 GD)          Discovered 1970-Apr-01 by Chernykh, L. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1970 GD = 1942 EJ = 1948 JH = 1948 JM = 1950 TU1 = 1953 EL = 1955 QL1 = 1959 JP = 1962 WP = 1962 XC1 = 1964 FE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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