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4098 Thraen (1987 WQ1)
Classification: Outer Main-belt Asteroid          SPK-ID: 2004098
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1276147108861125 3.3595e-08  
a 3.219382708820413 1.7318e-08 au
q 2.808542115202547 1.0982e-07 au
i 2.933391935846854 3.5518e-06 deg
node 99.33580189954424 7.4262e-05 deg
peri 11.36875902193569 7.6089e-05 deg
M 261.0125990145521 1.9062e-05 deg
tp 2459976.642601872553
(2023-Feb-01.14260187)
0.00011382 TDB
period 2109.877970276462
5.78
1.7024e-05
4.661e-08
d
yr
n .1706259817257717 1.3768e-09 deg/d
Q 3.63022330243828 1.9528e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1798  
   data-arc span      22894 days (62.68 yr)  
   first obs. used      1958-12-03  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51362  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:31:02  

Additional Information
 Earth MOID = 1.82563 au 
 Jupiter MOID = 1.48054 au 
 T_jup = 3.175 
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Orbital Elements at Epoch 2457097.5 (2015-Mar-16.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1239136793468303 3.1633e-08  
q 2.826010027868253 1.0241e-07 au
tp 2457832.456089076088
(2017-Mar-19.95608908)
0.00011232 TDB
node 99.46510069747266 7.4334e-05 deg
peri 6.90664085207242 7.6399e-05 deg
i 2.931497884450756 3.5354e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1798  
   data-arc span      22894 days (62.68 yr)  
   first obs. used      1958-12-03  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51362  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:31:02  

Additional Information
 Jupiter MOID = 1.48054 au 
 T_jup = 3.175 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.000620937569993E-15 -3.202527289134672E-15 8.474720378980949E-13 -3.327151258931595E-15 1.384755279413382E-13 5.333303890099962E-17
q -3.202527289134672E-15 1.048735052018736E-14 -1.934950902089592E-12 4.853545849708989E-15 -3.315465557883317E-13 8.419814165492208E-17
tp 8.474720378980949E-13 -1.934950902089592E-12 1.26157039137554E-8 -1.562498479166098E-11 2.003013357580758E-9 3.564153254516445E-13
node -3.327151258931595E-15 4.853545849708989E-15 -1.562498479166098E-11 5.525562335445104E-9 -5.520622131172523E-9 4.635335477293289E-11
peri 1.384755279413382E-13 -3.315465557883317E-13 2.003013357580758E-9 -5.520622131172523E-9 5.836812773897797E-9 -4.624999711907015E-11
i 5.333303890099962E-17 8.419814165492208E-17 3.564153254516445E-13 4.635335477293289E-11 -4.624999711907015E-11 1.249917079624169E-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 13.02   n/a MPO636125  
diameter diameter 13.854 km 2.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.064   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4098 Thraen (1987 WQ1)          Discovered 1987-Nov-26 by Borngen, F. at Tautenburg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1987 WQ1 = 1958 XZ = 1977 DP1 = 1981 WM8 = 1987 YB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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