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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .180976257678575 6.6199e-08  
a 2.489793380162082 9.0376e-09 au
q 2.039199891827458 1.6257e-07 au
i 4.695599021880117 4.7948e-06 deg
node 351.8142941384316 5.4894e-05 deg
peri 28.98099819339653 5.6473e-05 deg
M 281.0522086429909 1.8289e-05 deg
tp 2459315.188500249781
(2021-Apr-10.68850025)
7.4139e-05 TDB
period 1434.971873723776
3.93
7.8132e-06
2.139e-08
d
yr
n .2508759973572123 1.366e-09 deg/d
Q 2.940386868496704 1.0673e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2084  
   data-arc span      33340 days (91.28 yr)  
   first obs. used      1928-01-29  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47635  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:22:29  

Additional Information
 Earth MOID = 1.04308 au 
 Jupiter MOID = 2.53184 au 
 T_jup = 3.446 
[ 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 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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