Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
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 ]  
115 Thyra (A871 PA)
Classification: Main-belt Asteroid          SPK-ID: 2000115
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1931927552437731 3.0227e-08  
a 2.379083263482788 3.3637e-09 au
q 1.919461612856201 7.1744e-08 au
i 11.59420605973801 3.7379e-06 deg
node 308.796119986976 1.672e-05 deg
peri 97.06412515046627 1.9908e-05 deg
M 124.2271710531511 1.1075e-05 deg
tp 2458537.983762329338
(2019-Feb-23.48376233)
4.0774e-05 TDB
period 1340.333553037267
3.67
2.8426e-06
7.783e-09
d
yr
n .2685898589826547 5.6962e-10 deg/d
Q 2.838704914109375 4.0135e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2393  
   data-arc span      53914 days (147.61 yr)  
   first obs. used      1872-12-25  
   last obs. used      2020-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .517  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:09:50  

Additional Information
 Earth MOID = .969494 au 
 Jupiter MOID = 2.62943 au 
 T_jup = 3.487 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.6   n/a MPO502153 IRAS observations used: 17
magnitude slope G 0.12   n/a PDS3 (MPC 17257) Fit
diameter diameter 79.83 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
rotation period rot_per 7.241 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Scaltriti, F.; Zappala, V.; Harris, A.W. (1981) Icarus 46, 275-280.]
[Dotto, E.; De Angelis, G.; Di Martino, M.; Barucci, M.A.; et al. (1995) Icarus 117, 313-327.]
[Michalowski, T.; Kwiatkowski, T.; Pych, W.; Kryszczynska, A.; et al. (2004) Astron. Astrophys. 416, 353-366.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.2747   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
B-V BV 0.851   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=11.98, mean=19.65, max.=30.11) deg.
U-B UB 0.431   0.048 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=11.98, mean=19.65, max.=30.11) 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 S   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)

115 Thyra (A871 PA)          Discovered 1871-Aug-06 by Watson, J. C. at Ann Arbor
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-22 13:04 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin