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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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1809762177882956 3.6333e-08  
a 2.489793378748035 7.2355e-09 au
q 2.039199989987874 9.2944e-08 au
i 4.695594710603886 3.7196e-06 deg
node 351.8142587783942 4.8522e-05 deg
peri 28.98104755712918 4.9751e-05 deg
M 281.0522026753284 1.3213e-05 deg
tp 2459315.188523768995
(2021-Apr-10.68852377)
5.3423e-05 TDB
period 1434.971872501315
3.93
6.2552e-06
1.713e-08
d
yr
n .250875997570935 1.0936e-09 deg/d
Q 2.940386767508196 8.545e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2504  
   data-arc span      33877 days (92.75 yr)  
   first obs. used      1928-01-29  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45249  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:19:36  

Additional Information
 Earth MOID = 1.04308 au 
 Jupiter MOID = 2.53184 au 
 T_jup = 3.446 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456635.5 (2013-Dec-09.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .180814244853837 3.6353e-08  
q 2.039161273195658 9.2829e-08 au
tp 2456449.873505874925
(2013-Jun-06.37350588)
4.8061e-05 TDB
node 351.9371658652386 4.8577e-05 deg
peri 29.46493024682795 4.9808e-05 deg
i 4.693621195091703 3.7174e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2504  
   data-arc span      33877 days (92.75 yr)  
   first obs. used      1928-01-29  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45249  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:19:36  

Additional Information
 Jupiter MOID = 2.53184 au 
 T_jup = 3.446 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.321571130817818E-15 -3.369115396590407E-15 9.304020474131112E-16 -3.087407209984669E-15 -3.987486425835726E-15 -8.730366641954434E-16
q -3.369115396590407E-15 8.617308868616283E-15 8.135016866338514E-14 8.617966193509864E-15 2.946775541043286E-14 2.148412834766353E-15
tp 9.304020474131112E-16 8.135016866338514E-14 2.309851713747214E-9 1.629342057619455E-11 5.480086293089847E-10 -2.45507864941732E-13
node -3.087407209984669E-15 8.617966193509864E-15 1.629342057619455E-11 2.359742154928496E-9 -2.347416437583898E-9 8.149423904811946E-12
peri -3.987486425835726E-15 2.946775541043286E-14 5.480086293089847E-10 -2.347416437583898E-9 2.480807971638017E-9 -8.175636163155909E-12
i -8.730366641954434E-16 2.148412834766353E-15 -2.45507864941732E-13 8.149423904811946E-12 -8.175636163155909E-12 1.381880040780604E-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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2045-Dec-29 15:32 < 00:01 Hebe 0.0486473184412297 0.0486451262435933 0.0486495106695184 5.61711389728115 5.61711387453094 2468344.147069051 0.431192847019556 125.750829325731 22.5778432358474 -30.1935807454253 169591.73679972 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 04:19:43 2020-Nov-13 04:19

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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