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116 Sirona
Classification: Main-belt Asteroid          SPK-ID: 2000116
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1420931778445141 3.6238e-08  
a 2.766217338000847 9.7307e-09 au
q 2.373156725835714 1.0095e-07 au
i 3.563588274891798 5.0376e-06 deg
node 63.73716090410764 7.0633e-05 deg
peri 95.00385425771103 7.2425e-05 deg
M 324.6872931691336 1.7204e-05 deg
tp 2457565.337638297641
(2016-Jun-25.83763830)
8.0526e-05 JED
period 1680.458823827153
4.60
8.867e-06
2.428e-08
d
yr
n .2142272068173141 1.1304e-09 deg/d
Q 3.15927795016598 1.1113e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1665  
   data-arc span      52224 days (142.98 yr)  
   first obs. used      1872-12-23  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59308  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:31:10  

Additional Information
 Earth MOID = 1.38551 au 
 Jupiter MOID = 1.83393 au 
 T_jup = 3.322 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.82 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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. 2015-December); Warner et al., 2009 Published Reference List:
[Zeigler, K.W.; Florence, W.B. (1985) Icarus 62, 512-517.]
geometric albedo albedo 0.2560   0.047 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
B-V BV .873 mag .073 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=5.71, mean=12.00, max.=18.29) deg.
U-B UB .429 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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          Discovered 1871-Sep-08 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1954 UC3 = 1998 EK13 = 1998 ES21 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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