Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 75 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1418475746811853 3.6923e-08  
a 2.766235684368763 1.0571e-08 AU
q 2.373851861544505 1.0222e-07 AU
i 3.563496097852432 5.2474e-06 deg
node 63.73990808232581 7.4083e-05 deg
peri 94.96992230267472 7.6002e-05 deg
M 239.0005686122291 1.7846e-05 deg
tp 2457565.323847275100
(2016-Jun-25.82384728)
8.4119e-05 JED
period 1680.475541801484
4.60
9.6325e-06
2.637e-08
d
yr
n .2142250756081085 1.2279e-09 deg/d
Q 3.15861950719302 1.207e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1376  
   data-arc span      51781 days (141.77 yr)  
   first obs. used      1872-12-23  
   last obs. used      2014-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62945  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 13:44:41  

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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Oct-25 03:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin