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1381 Danubia (1930 QJ)
Classification: Main-belt Asteroid          SPK-ID: 2001381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1809762453413548 4.4955e-08  
a 2.489793381329777 7.6961e-09 au
q 2.039199923500958 1.1272e-07 au
i 4.695598967016326 4.254e-06 deg
node 351.8142921509234 5.1967e-05 deg
peri 28.98101744182333 5.326e-05 deg
M 281.0521964227777 1.4667e-05 deg
tp 2459315.188549181334
(2021-Apr-10.68854918)
5.9361e-05 TDB
period 1434.971874733264
3.93
6.6534e-06
1.822e-08
d
yr
n .2508759971807236 1.1632e-09 deg/d
Q 2.940386839158597 9.0889e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2314  
   data-arc span      33743 days (92.38 yr)  
   first obs. used      1928-01-29  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46327  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:30:40  

Additional Information
 Earth MOID = 1.04308 au 
 Jupiter MOID = 2.53184 au 
 T_jup = 3.446 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456245.5 (2012-Nov-14.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .180535339614621 4.5041e-08  
q 2.039174395625736 1.1271e-07 au
tp 2456449.622947119421
(2013-Jun-06.12294712)
5.2665e-05 TDB
node 351.9518714471593 5.2027e-05 deg
peri 29.36374102521956 5.3325e-05 deg
i 4.693841997097443 4.2526e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2314  
   data-arc span      33743 days (92.38 yr)  
   first obs. used      1928-01-29  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46327  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:30:40  

Additional Information
 Jupiter MOID = 2.53184 au 
 T_jup = 3.446 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.028662105941339E-15 -5.068968976558335E-15 5.682475849144107E-13 -8.399660924783109E-15 8.88153582511593E-14 -2.082820044549186E-15
q -5.068968976558335E-15 1.270399296540261E-14 -1.276108596329845E-12 2.072119591816052E-14 -1.915280077224568E-13 5.042043936490496E-15
tp 5.682475849144107E-13 -1.276108596329845E-12 2.773640355187919E-9 1.691369315834603E-12 6.353944528003319E-10 -2.638664610615403E-12
node -8.399660924783109E-15 2.072119591816052E-14 1.691369315834603E-12 2.706766583940425E-9 -2.696509725460836E-9 4.432884854687859E-11
peri 8.88153582511593E-14 -1.915280077224568E-13 6.353944528003319E-10 -2.696509725460836E-9 2.843557776240437E-9 -4.473551066637883E-11
i -2.082820044549186E-15 5.042043936490496E-15 -2.638664610615403E-12 4.432884854687859E-11 -4.473551066637883E-11 1.80842434845554E-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 12.3   n/a MPO473782  
diameter diameter 19.825 km 0.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.069   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.660   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=13.50 deg.
U-B UB 0.340   0.060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=13.50 deg.

1381 Danubia (1930 QJ)          Discovered 1930-Aug-20 by Skvortsov, E. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1930 QJ = 1928 BE = 1932 CG1 = 1936 DC = 1969 OV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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