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116 Sirona (A871 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000116
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 116 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1417777791398524 2.8322e-08  
a 2.767125483044984 7.4993e-09 au
q 2.374808577457575 8.0671e-08 au
i 3.563722313694272 3.1456e-07 deg
node 63.70715849192967 5.1913e-06 deg
peri 94.37637496719216 6.6665e-06 deg
M 350.8480700727135 4.4923e-06 deg
tp 2459243.241709984944
(2021-Jan-28.74170998)
2.103e-05 TDB
period 1681.286429947812
4.60
6.8348e-06
1.871e-08
d
yr
n .2141217543825501 8.7045e-10 deg/d
Q 3.159442388632393 8.5626e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3073  
   data-arc span      54146 days (148.24 yr)  
   first obs. used      1872-12-23  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49314  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:52:50  

Additional Information
 Earth MOID = 1.38699 au 
 Jupiter MOID = 1.82936 au 
 T_jup = 3.321 
[ show covariance matrix ]

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 7.87   n/a MPCxxxxx IRAS observations used: 5
diameter diameter 71.70 km 5.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
rotation period rot_per 12.028 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Zeigler, K.W.; Florence, W.B. (1985) Icarus 62, 512-517.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.2560   0.047 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
B-V BV 0.873   0.073 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.71, mean=12.00, max.=18.29) deg.
U-B UB 0.429   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.71, mean=12.00, max.=18.29) 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 Sk   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)

116 Sirona (A871 RA)          Discovered 1871-Sep-08 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1903-Nov-05 03:03 00:01 Jupiter 1.83954835487593 1.83954811668783 1.83954859306402 2.06199211165987 1.82507774680427 2416423.627080596 1.29434140337377 82.3828169877787 8.23934828490061 -87.0815030477123 3657788.27021469 T 116 CATAB v2.0g-lin.ifort 2021-May-03 17:53:43 2021-May-03 17:53
1926-Apr-13 02:34 00:01 Jupiter 1.98179590475131 1.98179541710586 1.98179639239688 2.38007539815223 2.19316117338222 2424618.607109573 1.02130351088258 38.479768306801 1.37117627743372 -77.0551023471679 5396655.44884796 T 116 CATAB v2.0g-lin.ifort 2021-May-03 17:53:43 2021-May-03 17:53
1986-Sep-05 21:48 < 00:01 Jupiter 1.83791259423998 1.8379123646484 1.83791282383156 2.00879733887337 1.76452385911134 2446679.408246291 0.326512126638741 28.1290533564187 7.73769221013625 78.7592426449729 4726386.48977232 T 116 CATAB v2.0g-lin.ifort 2021-May-03 17:53:43 2021-May-03 17:53
2047-Jan-28 01:16 < 00:01 Jupiter 1.9472954506783 1.9472951870844 1.94729571427209 2.65938528600128 2.49045828913571 2468738.553095426 0.392595270351577 13.5615718213127 4.50018260983539 87.5344980113311 4097010.64899605 T 116 CATAB v2.0g-lin.ifort 2021-May-03 17:53:43 2021-May-03 17:53
2069-Jul-07 21:11 < 00:01 Jupiter 1.84135908726517 1.84135886571403 1.84135930881631 1.9889040582573 1.7423381565905 2476935.382470066 0.674740004505967 42.6697506845527 11.1353479300511 -85.0037518900313 3972459.27752636 T 116 CATAB v2.0g-lin.ifort 2021-May-03 17:53:43 2021-May-03 17:53
2129-Nov-29 02:25 00:01 Jupiter 1.89450858672119 1.89450805788088 1.8945091155616 2.41494407150612 2.22210887000792 2498993.600534866 1.37509623199773 49.2579425031261 1.89273731297726 85.162529676871 3167098.54144122 T 116 CATAB v2.0g-lin.ifort 2021-May-03 17:53:43 2021-May-03 17:53
2152-May-09 05:18 00:02 Jupiter 1.86655920206838 1.86655877735813 1.86655962678001 2.04687689373427 1.81166460736337 2507190.721129929 1.66180568016039 100.798879943528 8.2178460426153 -85.4220984237079 4463294.13542965 T 116 CATAB v2.0g-lin.ifort 2021-May-03 17:53:43 2021-May-03 17:53

Alternate Designations
 A871 RA = 1954 UC3 = 1998 EK13 = 1998 ES21 
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