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49284 (1998 US29)
Classification: Main-belt Asteroid          SPK-ID: 2049284
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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 .2036104507725653 4.4632e-08  
a 2.531059622389759 9.4622e-09 au
q 2.015709431742741 1.1361e-07 au
i 10.73019236068994 9.3568e-06 deg
node 70.30445125238013 4.1788e-05 deg
peri 37.51551415873303 6.8292e-05 deg
M 85.33600705421802 4.8989e-05 deg
tp 2458651.856311513593
(2019-Jun-17.35631151)
0.00019964 TDB
period 1470.794476889024
4.03
8.2477e-06
2.258e-08
d
yr
n .2447656730133093 1.3726e-09 deg/d
Q 3.046409813036777 1.1389e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1555  
   data-arc span      15183 days (41.57 yr)  
   first obs. used      1978-11-29  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4844  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:33:26  

Additional Information
 Earth MOID = 1.04349 au 
 Jupiter MOID = 2.1573 au 
 T_jup = 3.398 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457048.5 (2015-Jan-26.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2036352590245367 4.3594e-08  
q 2.015785095852208 1.1039e-07 au
tp 2457182.141506354282
(2015-Jun-08.64150635)
0.0001978 TDB
node 70.348388115638 4.1797e-05 deg
peri 37.8147034697869 6.8257e-05 deg
i 10.72910398773692 9.3522e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1555  
   data-arc span      15183 days (41.57 yr)  
   first obs. used      1978-11-29  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4844  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:33:26  

Additional Information
 Jupiter MOID = 2.1573 au 
 T_jup = 3.398 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.900445773117932E-15 -4.801465016853754E-15 -7.270975457173454E-12 8.030179587357424E-14 -2.002108273000552E-12 -1.07059075289687E-14
q -4.801465016853754E-15 1.218603381208037E-14 1.859121671972248E-11 -2.034374415311886E-13 5.114991764189813E-12 2.711560664742937E-14
tp -7.270975457173454E-12 1.859121671972248E-11 3.9123932654281E-8 -4.409991260206094E-10 1.078011699171653E-8 6.076171735786526E-11
node 8.030179587357424E-14 -2.034374415311886E-13 -4.409991260206094E-10 1.746948373032453E-9 -1.832953830139755E-9 -3.519374312817636E-10
peri -2.002108273000552E-12 5.114991764189813E-12 1.078011699171653E-8 -1.832953830139755E-9 4.658981987888835E-9 3.619553986756595E-10
i -1.07059075289687E-14 2.711560664742937E-14 6.076171735786526E-11 -3.519374312817636E-10 3.619553986756595E-10 8.746391168414162E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO381623  
diameter diameter 3.503 km 0.361 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.274   0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49284 (1998 US29)          Discovered 1998-Oct-18 by Elst, E. W. at La Silla
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 US29 = 1978 WN10 = 1990 WP12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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