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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 79 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1418475729141961 3.6761e-08  
a 2.766235683541078 1.0408e-08 AU
q 2.373851865722134 1.019e-07 AU
i 3.563496302910856 5.1424e-06 deg
node 63.7399099487488 7.2891e-05 deg
peri 94.96992197687477 7.4693e-05 deg
M 239.0005676440126 1.7654e-05 deg
tp 2457565.323851541221
(2016-Jun-25.82385154)
8.3313e-05 JED
period 1680.475541047262
4.60
9.4846e-06
2.597e-08
d
yr
n .2142250757042558 1.2091e-09 deg/d
Q 3.158619501360022 1.1885e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1534  
   data-arc span      51931 days (142.18 yr)  
   first obs. used      1872-12-23  
   last obs. used      2015-02-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60295  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:26:04  

Additional Information
 Earth MOID = 1.38685 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-May); 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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