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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 ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .120669246837349 6.4345e-09  
a 2.694823136043492 7.1595e-09 au
q 2.369640857857261 1.6456e-08 au
i 6.414412602117751 2.3046e-07 deg
node 307.7252981481232 3.9091e-06 deg
peri 125.5930037678636 1.4186e-05 deg
M 93.67906961057584 1.2367e-05 deg
tp 2458780.031083426624
(2019-Oct-23.53108343)		 5.543e-05 TDB
period 1615.823156609644
4.42		 6.4393e-06
1.763e-08		 d
yr
n .2227966584879004 8.8788e-10 deg/d
Q 3.020005414229723 8.0235e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3199  
   data-arc span      54289 days (148.64 yr)  
   first obs. used      1872-08-02  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44194  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:53:37  

Additional Information
 Earth MOID = 1.39112 au 
 Jupiter MOID = 2.22125 au 
 T_jup = 3.351 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456970.5 (2014-Nov-09.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1183953336720287 6.3367e-09  
q 2.376176264403289 1.6187e-08 au
tp 2457164.132382476799
(2015-May-21.63238248)		 5.7277e-05 TDB
node 307.864600526918 3.8986e-06 deg
peri 125.6332046130244 1.4524e-05 deg
i 6.419667120608402 2.3056e-07 deg
   Orbit Determination Parameters
   # obs. used (total)      3199  
   data-arc span      54289 days (148.64 yr)  
   first obs. used      1872-08-02  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44194  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:53:37  

Additional Information
 Jupiter MOID = 2.22125 au 
 T_jup = 3.351 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.015428164533349E-17 -9.532639157318734E-17 -8.859473922395071E-14 -5.086193431983791E-15 -1.540266760053042E-14 -6.377363013822634E-17
q -9.532639157318734E-17 2.620046928335295E-16 2.047222807147206E-13 1.359904727931074E-14 3.265263185050693E-14 1.780926454716564E-16
tp -8.859473922395071E-14 2.047222807147206E-13 3.280668048860244E-9 2.911594870668546E-11 8.00214014815145E-10 5.787058969453554E-12
node -5.086193431983791E-15 1.359904727931074E-14 2.911594870668546E-11 1.519880840568354E-11 -8.05530781607967E-12 5.438980198336933E-13
peri -1.540266760053042E-14 3.265263185050693E-14 8.00214014815145E-10 -8.05530781607967E-12 2.109496182452248E-10 8.696110989415453E-13
i -6.377363013822634E-17 1.780926454716564E-16 5.787058969453554E-12 5.438980198336933E-13 8.696110989415453E-13 5.315564625143931E-14

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.93   n/a E2021B10  
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
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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