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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07442484788518916 2.2382e-08  
a 3.375328847159464 1.1697e-08 au
q 3.12412051114713 7.5904e-08 au
i 4.668654346651625 8.7699e-07 deg
node 205.9405348049243 2.2175e-05 deg
peri 175.6050038425019 1.9147e-05 deg
M 95.39946035291038 1.5549e-05 deg
tp 2458796.272373356027
(2019-Nov-08.77237336)
9.6963e-05 TDB
period 2265.022724368464
6.20
1.1774e-05
3.224e-08
d
yr
n .1589388027444076 8.2618e-10 deg/d
Q 3.626537183171798 1.2567e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3671  
   data-arc span      52806 days (144.57 yr)  
   first obs. used      1876-10-14  
   last obs. used      2021-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42248  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:37:20  

Additional Information
 Earth MOID = 2.12616 au 
 Jupiter MOID = 1.81584 au 
 T_jup = 3.143 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456188.5 (2012-Sep-18.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06871970958845576 2.1625e-08  
q 3.142223115123516 7.2386e-08 au
tp 2456491.882949362638
(2013-Jul-18.38294936)
0.0001069 TDB
node 206.426691957646 2.2389e-05 deg
peri 169.3050297632894 1.9975e-05 deg
i 4.636309367596524 8.7303e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3671  
   data-arc span      52806 days (144.57 yr)  
   first obs. used      1876-10-14  
   last obs. used      2021-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42248  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:37:20  

Additional Information
 Jupiter MOID = 1.81584 au 
 T_jup = 3.143 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.67626963701553E-16 -1.546831315878667E-15 6.908442837584363E-13 -8.280392193617697E-14 1.503937979655634E-13 4.917999135392028E-16
q -1.546831315878667E-15 5.239736054270251E-15 -2.036870817492536E-12 2.856487002201953E-13 -4.661218899456875E-13 -1.989545543944845E-15
tp 6.908442837584363E-13 -2.036870817492536E-12 1.142787132245412E-8 1.111880260758048E-9 5.930773181321499E-10 -5.648282240461937E-12
node -8.280392193617697E-14 2.856487002201953E-13 1.111880260758048E-9 5.012524994745731E-10 -3.209666666410459E-10 -4.866472798705097E-12
peri 1.503937979655634E-13 -4.661218899456875E-13 5.930773181321499E-10 -3.209666666410459E-10 3.99008611017812E-10 4.135664667806639E-12
i 4.917999135392028E-16 -1.989545543944845E-15 -5.648282240461937E-12 -4.866472798705097E-12 4.135664667806639E-12 7.621795641274816E-13

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 8.09   n/a E2021B10 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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