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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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1803424460891022 1.5492e-08  
a 2.48822049830222 6.6565e-09 au
q 2.039488727229353 4.1743e-08 au
i 4.697660664829898 7.4935e-07 deg
node 351.7886511401272 2.2338e-06 deg
peri 29.08866797351369 6.9586e-06 deg
M 20.34101346641416 8.8743e-06 deg
tp 2459315.496868473351
(2021-Apr-10.99686847)
3.5133e-05 TDB
period 1433.612312274538
3.93
5.7528e-06
1.575e-08
d
yr
n .2511139147715828 1.0077e-09 deg/d
Q 2.936952269375087 7.857e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2711  
   data-arc span      34151 days (93.50 yr)  
   first obs. used      1928-01-29  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44716  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:36:37  

Additional Information
 Earth MOID = 1.04263 au 
 Jupiter MOID = 2.53732 au 
 T_jup = 3.447 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456862.5 (2014-Jul-24.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1813261141442489 1.5291e-08  
q 2.037809148260061 4.1294e-08 au
tp 2456449.923808372508
(2013-Jun-06.42380837)
2.9166e-05 TDB
node 351.8979838325205 2.233e-06 deg
peri 29.4537170619049 6.9631e-06 deg
i 4.695863722398907 7.4897e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2711  
   data-arc span      34151 days (93.50 yr)  
   first obs. used      1928-01-29  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44716  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:36:37  

Additional Information
 Jupiter MOID = 2.53732 au 
 T_jup = 3.447 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.338124234903415E-16 -6.274893403232832E-16 -3.171659275408156E-13 1.88986579657411E-14 -8.464692202669119E-14 5.589795539729755E-16
q -6.274893403232832E-16 1.705178289507271E-15 8.480436876642091E-13 -5.007330665469108E-14 2.278244053907658E-13 -1.873608282724911E-15
tp -3.171659275408156E-13 8.480436876642091E-13 8.506625159911717E-10 -2.608593260171123E-11 1.936495595702929E-10 -4.715247799733958E-12
node 1.88986579657411E-14 -5.007330665469108E-14 -2.608593260171123E-11 4.986468228131055E-12 -9.896542167166625E-12 7.544498525053866E-14
peri -8.464692202669119E-14 2.278244053907658E-13 1.936495595702929E-10 -9.896542167166625E-12 4.848449878503401E-11 -7.565804754609475E-13
i 5.589795539729755E-16 -1.873608282724911E-15 -4.715247799733958E-12 7.544498525053866E-14 -7.565804754609475E-13 5.609561231175941E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.40   n/a MPO636082  
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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