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168 Sibylla (A876 SA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000168
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07406998068717223 4.0695e-08  
a 3.373861223791939 1.457e-08 au
q 3.123959388104471 1.4268e-07 au
i 4.669318179853406 4.444e-06 deg
node 205.960019117547 4.8615e-05 deg
peri 175.3661186824971 5.5539e-05 deg
M 32.68466043215955 2.6277e-05 deg
tp 2458794.991056880395
(2019-Nov-07.49105688)
0.00016519 TDB
period 2263.545606558086
6.20
1.4662e-05
4.014e-08
d
yr
n .1590425211477893 1.0302e-09 deg/d
Q 3.623763059479407 1.5649e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3221  
   data-arc span      51247 days (140.31 yr)  
   first obs. used      1880-04-13  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44156  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:11:01  

Additional Information
 Earth MOID = 2.1267 au 
 Jupiter MOID = 1.8169 au 
 T_jup = 3.143 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455809.5 (2011-Sep-05.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0687761539307036 3.9278e-08  
q 3.143671261281524 1.3625e-07 au
tp 2456489.589530487984
(2013-Jul-16.08953049)
0.00018527 TDB
node 206.4281871191704 4.9131e-05 deg
peri 168.8773818714217 5.7439e-05 deg
i 4.636272698047123 4.4257e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3221  
   data-arc span      51247 days (140.31 yr)  
   first obs. used      1880-04-13  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44156  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:11:01  

Additional Information
 Jupiter MOID = 1.8169 au 
 T_jup = 3.143 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.542763259341109E-15 -5.327786556685604E-15 3.362872197427079E-13 3.510602557388981E-15 6.110298782832633E-14 5.016104933705488E-17
q -5.327786556685604E-15 1.856293623110179E-14 -1.084688238848944E-12 -3.110148568111511E-15 -2.174587939006278E-13 9.539465737907132E-16
tp 3.362872197427079E-13 -1.084688238848944E-12 3.43235341938032E-8 3.500214340649083E-12 5.52852932470508E-9 3.171649265845064E-12
node 3.510602557388981E-15 -3.110148568111511E-15 3.500214340649083E-12 2.413853846197547E-9 -2.405880063978472E-9 -3.492747699043031E-12
peri 6.110298782832633E-14 -2.174587939006278E-13 5.52852932470508E-9 -2.405880063978472E-9 3.299214111457652E-9 3.840049197658078E-12
i 5.016104933705488E-17 9.539465737907132E-16 3.171649265845064E-12 -3.492747699043031E-12 3.840049197658078E-12 1.958724061251341E-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 8.1   n/a MPO502154 IRAS observations used: 6
diameter diameter 145.366 km 3.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 47.009 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Benishek, V.; Brinsfield, J.W. (2008) Minor Planet Bull. 35, 104-105.]
geometric albedo albedo 0.056   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.745   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=1.40, mean=7.89, max.=17.63) deg.
U-B UB 0.384   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=1.68, mean=11.14, max.=17.66) 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)

168 Sibylla (A876 SA)          Discovered 1876-Sep-28 by Watson, J. C. at Ann Arbor
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A876 SA = 1949 MO = A911 HF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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