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115 Thyra
Classification: Main-belt Asteroid          SPK-ID: 2000115
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1919355900763046 2.9687e-08  
a 2.380107629368279 3.6316e-09 AU
q 1.923280267080364 7.0483e-08 AU
i 11.60024295275686 3.5713e-06 deg
node 308.91380627 1.7893e-05 deg
peri 96.75850823476782 2.0175e-05 deg
M 253.8475347475655 8.9751e-06 deg
tp 2457195.976703411844
(2015-Jun-22.47670341)
3.3752e-05 JED
period 1341.199310724428
3.67
3.0697e-06
8.404e-09
d
yr
n .2684164815187323 6.1434e-10 deg/d
Q 2.836934991656194 4.3287e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1410  
   data-arc span      51327 days (140.53 yr)  
   first obs. used      1872-12-25  
   last obs. used      2013-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60456  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:09:05  

Additional Information
 Earth MOID = .97215 AU 
 T_jup = 3.487 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.51 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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.]
geometric albedo albedo 0.2747   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
B-V BV .851 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=11.98, mean=19.65, max.=30.11) deg.
U-B UB .431 mag .048 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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          Discovered 1871-Aug-06 by Watson, J. C. at Ann Arbor
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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