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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1104366900043224 1.7336e-08  
a 3.144046991268322 1.0822e-08 au
q 2.7968288483346 5.3153e-08 au
i 2.513959231821127 9.6209e-07 deg
node 78.90868011356859 1.7805e-05 deg
peri 87.46113948742246 2.2587e-05 deg
M 121.5949826979621 9.3611e-06 deg
tp 2458708.726997857726
(2019-Aug-13.22699786)
5.2122e-05 TDB
period 2036.25408941621
5.57
1.0513e-05
2.878e-08
d
yr
n .1767952250513153 9.1277e-10 deg/d
Q 3.491265134202044 1.2017e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3343  
   data-arc span      25820 days (70.69 yr)  
   first obs. used      1950-10-15  
   last obs. used      2021-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41912  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:49:33  

Additional Information
 Earth MOID = 1.80613 au 
 Jupiter MOID = 1.48021 au 
 T_jup = 3.199 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457091.5 (2015-Mar-10.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1118372260820284 1.7398e-08  
q 2.788373529977559 5.342e-08 au
tp 2456669.304128371720
(2014-Jan-11.80412837)
5.0351e-05 TDB
node 78.93962335192461 1.7782e-05 deg
peri 86.06133133161943 2.2477e-05 deg
i 2.516077100344082 9.6343e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3343  
   data-arc span      25820 days (70.69 yr)  
   first obs. used      1950-10-15  
   last obs. used      2021-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41912  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:49:33  

Additional Information
 Jupiter MOID = 1.48021 au 
 T_jup = 3.199 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.026948661990747E-16 -9.138208967279572E-16 1.724650919106574E-14 2.873346611198167E-14 -5.023370923572498E-14 -2.308548075339074E-15
q -9.138208967279572E-16 2.853709230820791E-15 -4.986826104059907E-14 -7.680801575903626E-14 1.466879562216495E-13 7.337753772188481E-15
tp 1.724650919106574E-14 -4.986826104059907E-14 2.535253474233899E-9 -3.242618782232602E-10 7.568316810610157E-10 -1.951050008536088E-11
node 2.873346611198167E-14 -7.680801575903626E-14 -3.242618782232602E-10 3.16208330427854E-10 -3.722935997813148E-10 -6.828827330322965E-12
peri -5.023370923572498E-14 1.466879562216495E-13 7.568316810610157E-10 -3.722935997813148E-10 5.052312256390061E-10 3.937230889192944E-12
i -2.308548075339074E-15 7.337753772188481E-15 -1.951050008536088E-11 -6.828827330322965E-12 3.937230889192944E-12 9.28189339864998E-13

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 11.50   n/a MPCxxxxx  
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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