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123 Brunhild (A872 OB)
Classification: Main-belt Asteroid          SPK-ID: 2000123
[ 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1206203596797625 3.6372e-08  
a 2.695223627205938 8.466e-09 au
q 2.370124783874964 9.8538e-08 au
i 6.414358263282383 4.7581e-06 deg
node 307.7251516489441 3.5157e-05 deg
peri 125.6747981306284 4.0519e-05 deg
M 49.05219195580827 1.961e-05 deg
tp 2458780.285174818512
(2019-Oct-23.78517482)		 8.7838e-05 TDB
period 1616.183373349709
4.42		 7.6149e-06
2.085e-08		 d
yr
n .2227470013219244 1.0495e-09 deg/d
Q 3.020322470536912 9.4872e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2917  
   data-arc span      54162 days (148.29 yr)  
   first obs. used      1872-08-02  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45624  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 19:31:36  

Additional Information
 Earth MOID = 1.39205 au 
 Jupiter MOID = 2.22056 au 
 T_jup = 3.351 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455835.5 (2011-Oct-01.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1184866595258062 3.6299e-08  
q 2.37582528527606 9.8024e-08 au
tp 2455545.261279592161
(2010-Dec-14.76127959)		 8.8595e-05 TDB
node 307.8966441358933 3.5103e-05 deg
peri 125.1514005859986 4.0718e-05 deg
i 6.419292942722273 4.7607e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2917  
   data-arc span      54162 days (148.29 yr)  
   first obs. used      1872-08-02  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45624  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 19:31:36  

Additional Information
 Jupiter MOID = 2.22056 au 
 T_jup = 3.351 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.317630779647919E-15 -3.547962883713104E-15 6.062791643655446E-13 -2.384536044072965E-15 1.469218983681428E-13 -5.110284102297398E-16
q -3.547962883713104E-15 9.6087630186791E-15 -1.619553266101265E-12 4.691191464254631E-15 -3.906586720727327E-13 1.581032661778786E-15
tp 6.062791643655446E-13 -1.619553266101265E-12 7.849159508899591E-9 -1.073358399485765E-11 1.842048380149887E-9 3.052799669360415E-13
node -2.384536044072965E-15 4.691191464254631E-15 -1.073358399485765E-11 1.232191524185272E-9 -1.22655673655558E-9 4.961379818609231E-12
peri 1.469218983681428E-13 -3.906586720727327E-13 1.842048380149887E-9 -1.22655673655558E-9 1.657975555585196E-9 -4.840274330588296E-12
i -5.110284102297398E-16 1.581032661778786E-15 3.052799669360415E-13 4.961379818609231E-12 -4.840274330588296E-12 2.266443478786957E-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 8.9   n/a MPO332813  
diameter diameter 45.209 km 1.883 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.873 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Barucci, M.A.; Di Martino, M. (1984) Astron. Astrophys. Suppl. Ser. 57, 103-106.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2016) Minor Planet Bull. 43, 222-224.]
geometric albedo albedo 0.261   0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.850   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.22, mean=9.07, max.=20.32) deg.
U-B UB 0.395   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.22, mean=9.07, max.=20.32) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

123 Brunhild (A872 OB)          Discovered 1872-Jul-31 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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