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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1276147108622364 3.3832e-08  
a 3.219382708835711 1.7411e-08 au
q 2.808542115292759 1.104e-07 au
i 2.933392025409896 3.5692e-06 deg
node 99.33580200079196 7.4263e-05 deg
peri 11.36875891133599 7.6101e-05 deg
M 261.0125990254264 1.9153e-05 deg
tp 2459976.642601812957
(2023-Feb-01.14260181)
0.0001144 TDB
period 2109.877970291501
5.78
1.7116e-05
4.686e-08
d
yr
n .1706259817245555 1.3842e-09 deg/d
Q 3.630223302378664 1.9633e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1763  
   data-arc span      22665 days (62.05 yr)  
   first obs. used      1958-12-03  
   last obs. used      2020-12-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51649  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:56:34  

Additional Information
 Earth MOID = 1.82563 au 
 Jupiter MOID = 1.48054 au 
 T_jup = 3.175 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457081.5 (2015-Feb-28.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1239163986720487 3.1848e-08  
q 2.826024722061037 1.0291e-07 au
tp 2457832.422132630969
(2017-Mar-19.92213263)
0.00011276 TDB
node 99.46538318359958 7.4335e-05 deg
peri 6.900339924683044 7.6412e-05 deg
i 2.931510043716753 3.5528e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1763  
   data-arc span      22665 days (62.05 yr)  
   first obs. used      1958-12-03  
   last obs. used      2020-12-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51649  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:56:34  

Additional Information
 Jupiter MOID = 1.48054 au 
 T_jup = 3.175 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.014318774996504E-15 -3.240228213424388E-15 8.84340607917378E-13 -3.573173027291645E-15 1.434740459352942E-13 5.745809167255179E-17
q -3.240228213424388E-15 1.059120682934944E-14 -2.036131282128702E-12 5.538434108663582E-15 -3.452676844839514E-13 7.470460110371852E-17
tp 8.84340607917378E-13 -2.036131282128702E-12 1.271569241676948E-8 -1.63113628307272E-11 2.016572186014426E-9 3.534108143082542E-13
node -3.573173027291645E-15 5.538434108663582E-15 -1.63113628307272E-11 5.525636101637774E-9 -5.520785630360681E-9 4.650088816017468E-11
peri 1.434740459352942E-13 -3.452676844839514E-13 2.016572186014426E-9 -5.520785630360681E-9 5.838720828722602E-9 -4.639833732887433E-11
i 5.745809167255179E-17 7.470460110371852E-17 3.534108143082542E-13 4.650088816017468E-11 -4.639833732887433E-11 1.262243682567594E-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 13.01   n/a MPCxxxxx  
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

[ show close-approach data ]
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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