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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1108735007208012 3.1545e-08  
a 3.139332777993444 1.2273e-08 au
q 2.791263962969753 9.6274e-08 au
i 2.515730173598953 3.5585e-06 deg
node 78.92391519853811 8.2906e-05 deg
peri 86.67148139491287 8.4933e-05 deg
M 52.25139403528453 1.7057e-05 deg
tp 2458705.616929798767
(2019-Aug-10.11692980)
9.6218e-05 TDB
period 2031.676039126484
5.56
1.1914e-05
3.262e-08
d
yr
n .1771936042297282 1.0391e-09 deg/d
Q 3.487401593017135 1.3633e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3026  
   data-arc span      25447 days (69.67 yr)  
   first obs. used      1950-10-15  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43216  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:36:45  

Additional Information
 Earth MOID = 1.79997 au 
 Jupiter MOID = 1.48673 au 
 T_jup = 3.200 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456773.5 (2014-Apr-26.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1117811136768395 3.142e-08  
q 2.787928659131749 9.5964e-08 au
tp 2456668.751447762792
(2014-Jan-11.25144776)
9.6077e-05 TDB
node 78.93788934588133 8.289e-05 deg
peri 85.93882067237881 8.4895e-05 deg
i 2.516244713386981 3.5592e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3026  
   data-arc span      25447 days (69.67 yr)  
   first obs. used      1950-10-15  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43216  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:36:45  

Additional Information
 Jupiter MOID = 1.48673 au 
 T_jup = 3.200 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.872165371401068E-16 -2.997437079288238E-15 6.263904209698458E-13 -4.440466676301909E-15 1.284396003597252E-13 -2.307305836105654E-16
q -2.997437079288238E-15 9.20902361656075E-15 -2.060377529098417E-12 1.201214092560945E-14 -4.171792878409069E-13 6.305243940530517E-16
tp 6.263904209698458E-13 -2.060377529098417E-12 9.230796327631004E-9 -2.84743668494437E-11 1.780640568935135E-9 -1.768850144403046E-13
node -4.440466676301909E-15 1.201214092560945E-14 -2.84743668494437E-11 6.870774613308971E-9 -6.869563622461819E-9 -7.636388039428069E-11
peri 1.284396003597252E-13 -4.171792878409069E-13 1.780640568935135E-9 -6.869563622461819E-9 7.207242347331237E-9 7.624025444834336E-11
i -2.307305836105654E-16 6.305243940530517E-16 -1.768850144403046E-13 -7.636388039428069E-11 7.624025444834336E-11 1.266803272783472E-11

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 11.4   n/a MPO347531  
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. 2019-August); 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.]
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

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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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