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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07406998342601762 3.9223e-08  
a 3.373861222947598 1.4104e-08 au
q 3.123959378082186 1.3697e-07 au
i 4.669317649093768 4.3615e-06 deg
node 205.9600225530754 4.8255e-05 deg
peri 175.3661151248143 5.5226e-05 deg
M 32.68466086501201 2.621e-05 deg
tp 2458794.991054235926
(2019-Nov-07.49105424)
0.00016479 TDB
period 2263.545605708376
6.20
1.4194e-05
3.886e-08
d
yr
n .1590425212074922 9.9731e-10 deg/d
Q 3.623763067813011 1.5149e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3375  
   data-arc span      51337 days (140.55 yr)  
   first obs. used      1880-04-13  
   last obs. used      2020-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43346  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:51:30  

Additional Information
 Earth MOID = 2.1267 au 
 Jupiter MOID = 1.8169 au 
 T_jup = 3.143 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455921.5 (2011-Dec-26.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06879848672564895 3.7863e-08  
q 3.143050379039622 1.3072e-07 au
tp 2456490.351499725553
(2013-Jul-16.85149973)
0.00018511 TDB
node 206.4290689842244 4.8769e-05 deg
peri 169.0210901051251 5.7125e-05 deg
i 4.636308381133675 4.3436e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3375  
   data-arc span      51337 days (140.55 yr)  
   first obs. used      1880-04-13  
   last obs. used      2020-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43346  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:51:30  

Additional Information
 Jupiter MOID = 1.8169 au 
 T_jup = 3.143 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.433612039084997E-15 -4.926372018642254E-15 3.605292415267039E-13 4.141761296572906E-15 5.755749342562224E-14 7.394870062693759E-17
q -4.926372018642254E-15 1.70871020795348E-14 -1.171174071758176E-12 -5.228400523511323E-15 -2.042636016863594E-13 8.424663617323468E-16
tp 3.605292415267039E-13 -1.171174071758176E-12 3.426651301759338E-8 2.892523448717698E-12 5.522974847116873E-9 3.199666043767473E-12
node 4.141761296572906E-15 -5.228400523511323E-15 2.892523448717698E-12 2.378440240044619E-9 -2.370673809241774E-9 1.541174480764419E-12
peri 5.755749342562224E-14 -2.042636016863594E-13 5.522974847116873E-9 -2.370673809241774E-9 3.263285851848175E-9 -1.166807762694351E-12
i 7.394870062693759E-17 8.424663617323468E-16 3.199666043767473E-12 1.541174480764419E-12 -1.166807762694351E-12 1.886717362153236E-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. 2020-October); 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

[ show close-approach data ]
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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