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939 Isberga (A920 TD)
Classification: Main-belt Asteroid          SPK-ID: 2000939
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1771979720771816 2.0466e-08  
a 2.247251298122382 4.5754e-09 au
q 1.849042925347282 4.6343e-08 au
i 2.584108419954212 1.4046e-06 deg
node 327.053781008132 2.2097e-05 deg
peri 6.156335984369604 2.3169e-05 deg
M 354.5152426186406 5.0837e-06 deg
tp 2459415.246958040308
(2021-Jul-19.74695804)
1.7411e-05 TDB
period 1230.483761678871
3.37
3.7579e-06
1.029e-08
d
yr
n .2925678592530276 8.9351e-10 deg/d
Q 2.645459670897482 5.3862e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3954  
   data-arc span      36791 days (100.73 yr)  
   first obs. used      1920-10-04  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:45:07  

Additional Information
 Earth MOID = .837999 au 
 Jupiter MOID = 2.7082 au 
 T_jup = 3.608 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456508.5 (2013-Aug-04.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1775798622118566 2.0555e-08  
q 1.847451062846189 4.6537e-08 au
tp 2456954.155919089891
(2014-Oct-23.65591909)
1.4226e-05 TDB
node 327.1434637318933 2.2067e-05 deg
peri 5.980978745678394 2.3137e-05 deg
i 2.587785703566237 1.4054e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3954  
   data-arc span      36791 days (100.73 yr)  
   first obs. used      1920-10-04  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:45:07  

Additional Information
 Jupiter MOID = 2.7082 au 
 T_jup = 3.608 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.225228671170308E-16 -9.534786745375612E-16 -2.129253502832054E-13 1.333475703243927E-13 -2.069565734695419E-13 -9.323285945833783E-15
q -9.534786745375612E-16 2.165674051697523E-15 4.894454089721544E-13 -2.983258023904573E-13 4.671635298228753E-13 2.129049613589403E-14
tp -2.129253502832054E-13 4.894454089721544E-13 2.023735858140627E-10 -1.413182983397454E-11 7.914221087078565E-11 1.799921018066964E-12
node 1.333475703243927E-13 -2.983258023904573E-13 -1.413182983397454E-11 4.869521984740859E-10 -5.001747696455807E-10 -1.382363269069622E-11
peri -2.069565734695419E-13 4.671635298228753E-13 7.914221087078565E-11 -5.001747696455807E-10 5.353223389848653E-10 1.421856699865537E-11
i -9.323285945833783E-15 2.129049613589403E-14 1.799921018066964E-12 -1.382363269069622E-11 1.421856699865537E-11 1.975037928120194E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.07   n/a MPCxxxxx  
diameter diameter 10.390 km 0.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 2.9173 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Molnar, L.A.; Haegert, M.J.; Beaumonts, C.N.; Block, M.J.; et al. (2008) Minor Planet Bull. 35, 9-12.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Carry, B.; Matter, A.; Scheirich, P.; Pravec, P.; et al. (2015) Icarus 248, 516-525.]
[Klinglesmith III, D.K. (2017) Minor Planet Bull. 44, 345-348.]
geometric albedo albedo 0.228   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.930   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.58 deg.
U-B UB 0.540   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.58 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

939 Isberga (A920 TD)          Discovered 1920-Oct-04 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A920 TD = 1930 QP = 1957 QE = 1957 UU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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