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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07442484705936167 2.2371e-08  
a 3.375328844948587 1.153e-08 au
q 3.124120511888237 7.5902e-08 au
i 4.668654348324991 8.7698e-07 deg
node 205.9405352042945 2.2173e-05 deg
peri 175.6050030808934 1.9138e-05 deg
M 95.39946116857621 1.5529e-05 deg
tp 2458796.272368813811
(2019-Nov-08.77236881)
9.6865e-05 TDB
period 2265.022722143043
6.20
1.1606e-05
3.178e-08
d
yr
n .1589388029005675 8.1439e-10 deg/d
Q 3.626537178008937 1.2388e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3675  
   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      .42289  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 14:21:22  

Additional Information
 Earth MOID = 2.12616 au 
 Jupiter MOID = 1.81584 au 
 T_jup = 3.143 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456181.5 (2012-Sep-11.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06872458925544191 2.1615e-08  
q 3.142241430162499 7.2384e-08 au
tp 2456491.838247619737
(2013-Jul-18.33824762)
0.00010687 TDB
node 206.4268098802283 2.2387e-05 deg
peri 169.2967665474851 1.9965e-05 deg
i 4.636305092492005 8.7302e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3675  
   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      .42289  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 14:21:22  

Additional Information
 Jupiter MOID = 1.81584 au 
 T_jup = 3.143 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.672170903027917E-16 -1.546619376933128E-15 6.892557249419086E-13 -8.269560157863517E-14 1.500265092807941E-13 4.938914257113855E-16
q -1.546619376933128E-15 5.239405673819319E-15 -2.036336474652464E-12 2.856773665994128E-13 -4.660681809723014E-13 -1.990473168828318E-15
tp 6.892557249419086E-13 -2.036336474652464E-12 1.142040955871959E-8 1.112194943942159E-9 5.914965803907156E-10 -5.637610408445289E-12
node -8.269560157863517E-14 2.856773665994128E-13 1.112194943942159E-9 5.011661655538998E-10 -3.208311248023342E-10 -4.866557855306801E-12
peri 1.500265092807941E-13 -4.660681809723014E-13 5.914965803907156E-10 -3.208311248023342E-10 3.986102245103365E-10 4.137498691496277E-12
i 4.938914257113855E-16 -1.990473168828318E-15 -5.637610408445289E-12 -4.866557855306801E-12 4.137498691496277E-12 7.62159385771427E-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

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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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