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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1803424461839922 1.5545e-08  
a 2.488220498206303 6.676e-09 au
q 2.039488726914627 4.1899e-08 au
i 4.69766066384911 7.4957e-07 deg
node 351.7886511482338 2.2362e-06 deg
peri 29.0886679288614 6.9857e-06 deg
M 20.34101353564106 8.9157e-06 deg
tp 2459315.496868202356
(2021-Apr-10.99686820)
3.5296e-05 TDB
period 1433.612312191642
3.93
5.7696e-06
1.58e-08
d
yr
n .2511139147861029 1.0106e-09 deg/d
Q 2.936952269497979 7.8799e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2681  
   data-arc span      33953 days (92.96 yr)  
   first obs. used      1928-01-29  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44959  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:24:54  

Additional Information
 Earth MOID = 1.04263 au 
 Jupiter MOID = 2.53732 au 
 T_jup = 3.447 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.39   n/a E2021B10  
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

Alternate Designations
 1930 QJ = 1928 BE = 1932 CG1 = 1936 DC = 1969 OV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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