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159 Aemilia (A876 BA)
Classification: Main-belt Asteroid          SPK-ID: 2000159
[ 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 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1067231603932329 3.1118e-08  
a 3.102132401504816 1.0587e-08 au
q 2.771063027657973 9.6816e-08 au
i 6.131078743574784 3.0657e-06 deg
node 134.1158010429594 3.4269e-05 deg
peri 333.1959195370079 3.7837e-05 deg
M 106.6369062841252 1.6359e-05 deg
tp 2458409.355085289460
(2018-Oct-17.85508529)		 9.0545e-05 TDB
period 1995.670886482527
5.46		 1.0217e-05
2.797e-08		 d
yr
n .1803904654010955 9.2349e-10 deg/d
Q 3.433201775351659 1.1717e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3456  
   data-arc span      42639 days (116.74 yr)  
   first obs. used      1904-01-11  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42553  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:46  

Additional Information
 Earth MOID = 1.78948 au 
 Jupiter MOID = 1.67604 au 
 T_jup = 3.204 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455339.5 (2010-May-23.0) TDB
Reference: JPL 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1106699526406078 3.045e-08  
q 2.755738288174773 9.4917e-08 au
tp 2454428.875775522957
(2007-Nov-24.37577552)		 9.0988e-05 TDB
node 134.3202201841843 3.4324e-05 deg
peri 334.9191072086545 3.7783e-05 deg
i 6.128481774039721 3.0639e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3456  
   data-arc span      42639 days (116.74 yr)  
   first obs. used      1904-01-11  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42553  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:46  

Additional Information
 Jupiter MOID = 1.67604 au 
 T_jup = 3.204 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.271740386041801E-16 -2.875402316882096E-15 -3.606951662799927E-13 2.590061497512467E-15 -8.774920576520087E-14 3.971990479537821E-16
q -2.875402316882096E-15 9.009152180166348E-15 8.926667931006423E-13 -9.482407322923168E-15 2.404360044883785E-13 -8.960892786557296E-16
tp -3.606951662799927E-13 8.926667931006423E-13 8.278747330227036E-9 -1.076901784940501E-11 1.457972684020542E-9 -1.86133529222059E-12
node 2.590061497512467E-15 -9.482407322923168E-15 -1.076901784940501E-11 1.17814606663322E-9 -1.172953127930047E-9 -1.56141068965651E-11
peri -8.774920576520087E-14 2.404360044883785E-13 1.457972684020542E-9 -1.172953127930047E-9 1.427582050538828E-9 1.517138930590163E-11
i 3.971990479537821E-16 -8.960892786557296E-16 -1.86133529222059E-12 -1.56141068965651E-11 1.517138930590163E-11 9.38762144280657E-12

[ 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 8.3   n/a MPO473762 IRAS observations used: 17
diameter diameter 125.236 km 1.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 24.476 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2013) Minor Planet Bull. 40, 85-87.]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Marciniak, A.; Bartczak, P.; Muller, T.; Sanabria, J.J.; et al. (2018) Astron. Astrophys. 610, A7.]
geometric albedo albedo 0.064   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.700   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.71, mean=8.02, max.=9.80) deg.
U-B UB 0.380   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.71, mean=8.02, max.=9.80) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Ch   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)

159 Aemilia (A876 BA)          Discovered 1876-Jan-26 by Henry, Paul at Paris
In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A876 BA = 1959 EG1 
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