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405 Thia (A895 OB)
Classification: Main-belt Asteroid          SPK-ID: 2000405
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 112 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2431038891557806 3.6132e-08  
a 2.585145143628118 5.2735e-09 au
q 1.956686305179943 9.2983e-08 au
i 11.93881548271487 3.6081e-06 deg
node 255.2168581717524 1.8348e-05 deg
peri 308.863286057919 1.9535e-05 deg
M 99.30711995739118 8.9586e-06 deg
tp 2458581.702856732489
(2019-Apr-08.20285673)
3.7347e-05 TDB
period 1518.188943964867
4.16
4.6455e-06
1.272e-08
d
yr
n .237124635527797 7.2558e-10 deg/d
Q 3.213603982076293 6.5555e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2741  
   data-arc span      44326 days (121.36 yr)  
   first obs. used      1899-06-22  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44431  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:29:55  

Additional Information
 Earth MOID = .975266 au 
 Jupiter MOID = 1.88028 au 
 T_jup = 3.351 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.6   n/a MPO492753 IRAS observations used: 15
diameter diameter 108.894 km 0.312 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.08 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Wang, X.-B. (2002) Earth, Moon, and Planets 91, 25-30.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.018   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
B-V BV 0.698   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.35, mean=16.80, max.=27.16) deg.
U-B UB 0.388   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.35, mean=16.80, max.=27.16) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Ch   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)

405 Thia (A895 OB)          Discovered 1895-Jul-23 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A895 OB = 1950 XA = 1951 AO = 1956 EZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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