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15 Eunomia (A851 OA)
Classification: Main-belt Asteroid          SPK-ID: 2000015
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1863457325340812 2.55e-08  
a 2.644255449261366 3.2645e-09 au
q 2.151509730561521 6.7204e-08 au
i 11.75338145992145 2.4326e-06 deg
node 292.9352671843799 1.3463e-05 deg
peri 98.61791691608779 1.4944e-05 deg
M 60.8458288501527 7.2324e-06 deg
tp 2458935.050537904942
(2020-Mar-26.55053790)
3.1305e-05 TDB
period 1570.55640723647
4.30
2.9084e-06
7.963e-09
d
yr
n .2292181282641425 4.2447e-10 deg/d
Q 3.137001167961211 3.8728e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2667  
   data-arc span      61928 days (169.55 yr)  
   first obs. used      1851-09-02  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56539  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:43:22  

Additional Information
 Earth MOID = 1.19387 au 
 Jupiter MOID = 2.41825 au 
 T_jup = 3.339 
[ hide covariance matrix ]
Orbital Elements at Epoch 2451007.5 (1998-Jul-13.0) TDB
Reference: JPL 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .186698252326672 2.529e-08  
q 2.150662582338513 6.6564e-08 au
tp 2451077.461688860079
(1998-Sep-20.96168886)
2.6238e-05 TDB
node 293.5337110855567 1.3482e-05 deg
peri 96.86914940852847 1.4972e-05 deg
i 11.7485451422222 2.4276e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2667  
   data-arc span      61928 days (169.55 yr)  
   first obs. used      1851-09-02  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56539  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:43:22  

Additional Information
 Jupiter MOID = 2.41825 au 
 T_jup = 3.339 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.396073074880213E-16 -1.682082625711181E-15 1.368235413402667E-13 -3.857473404400398E-15 3.882053430152116E-14 -2.572926044520723E-15
q -1.682082625711181E-15 4.430792812944609E-15 -3.501009137160417E-13 9.663779471245523E-15 -9.935823570800201E-14 6.771734999798812E-15
tp 1.368235413402667E-13 -3.501009137160417E-13 6.884532693428443E-10 -2.89406902265575E-12 1.796996491655513E-10 -9.517786995760339E-13
node -3.857473404400398E-15 9.663779471245523E-15 -2.89406902265575E-12 1.817600798810404E-10 -1.78517903076948E-10 -6.633802457657102E-12
peri 3.882053430152116E-14 -9.935823570800201E-14 1.796996491655513E-10 -1.78517903076948E-10 2.241711767554038E-10 6.262260123551541E-12
i -2.572926044520723E-15 6.771734999798812E-15 -9.517786995760339E-13 -6.633802457657102E-12 6.262260123551541E-12 5.893275891787261E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.37   n/a MPCxxxxx IRAS observations used: 21
magnitude slope G 0.23   n/a PDS3 (MPC 17257) Fit
diameter diameter 231.689 km 2.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.083 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 200-220.]
[Cailliate, C. (1956) Publ. Observ. Lyon 3, fasc. 28.]
[Van Houten-Groeneveld, I.; van Houten, C.J. (1958) Astrophys. J. 127, 253-273.]
[Cailliate, C. (1960) Bull. Astronomique XXIII, fasc. III.]
[Scaltriti, F.; Zappala, V. (1975) Astron. Astrophys. Suppl. Ser. 19, 249-255.]
[Chang, Y.C.; Zhou, X.-h.; Yang, X.-y.; Zhang, Y.-y.; et al. (1981) Acta Astron. Sin. 22, 169-173; Chin. Astron. Astrophys. 5, 434-437.]
[Lupishko, D.F.; Belskaja, I.N.; Velichko, F.P. (1985) Vestn. Kharkov Univ. 278, 51-56.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Melillo, F.J. (1986) Minor Planet Bull. 13, 21-22.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1989) Astron. Astrophys. Suppl. Ser. 78, 519-532.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[De Angelis, G. (1992) in Physical properties of small solar system bodies. A. Brahic, J.-C. Gerard, J. Surdej, eds. Universite de Liege, Institut d'Astrophysique, Liege, pp. 195-201.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Nathues, A.; Mottola, S.; Kaasalainen, M.; Neukum, G. (2005) Icarus 175, 452-463.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.]
[Cellino, A.; Hestroffer, D.; Lu, X.-P.; Muinonen, K.; Tanga, P. (2019) Astron. Astrophys. 631, A67.]
geometric albedo albedo 0.248   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.839   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=23; phase (min.=3.66, mean=16.49, max.=25.91) deg.
U-B UB 0.451   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=15; phase (min.=6.04, mean=19.34, max.=25.91) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 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)

15 Eunomia (A851 OA)          Discovered 1851-Jul-29 by De Gasparis, A. at Naples
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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