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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1108735020908319 3.0975e-08  
a 3.139332777682966 1.2196e-08 au
q 2.791263958392717 9.4186e-08 au
i 2.51573030482023 3.5535e-06 deg
node 78.92392934017151 8.0378e-05 deg
peri 86.67146733814569 8.2461e-05 deg
M 52.25139414014189 1.7049e-05 deg
tp 2458705.616929250745
(2019-Aug-10.11692925)
9.6182e-05 TDB
period 2031.676038825087
5.56
1.184e-05
3.242e-08
d
yr
n .1771936042560147 1.0326e-09 deg/d
Q 3.487401596973215 1.3549e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3145  
   data-arc span      25495 days (69.80 yr)  
   first obs. used      1950-10-15  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42505  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:41:14  

Additional Information
 Earth MOID = 1.79997 au 
 Jupiter MOID = 1.48673 au 
 T_jup = 3.200 
[ 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 11.4   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

[ 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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