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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 122 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2433683530653953 1.8868e-08  
a 2.584027917754822 4.6304e-09 au
q 1.955157299135828 4.7883e-08 au
i 11.93920186470412 6.6521e-07 deg
node 255.2032171836601 1.7644e-06 deg
peri 308.7604735699219 4.0603e-06 deg
M 193.3984825567446 2.8506e-06 deg
tp 2460098.635094981483
(2023-Jun-03.13509498)
1.3014e-05 TDB
period 1517.20487347558
4.15
4.0781e-06
1.117e-08
d
yr
n .2372784363494165 6.3779e-10 deg/d
Q 3.212898536373815 5.7573e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3018  
   data-arc span      44608 days (122.13 yr)  
   first obs. used      1899-06-22  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42813  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:34:50  

Additional Information
 Earth MOID = .974484 au 
 Jupiter MOID = 1.87899 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 8.56   n/a MPCxxxxx 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 9.950 h n/a LCDB (Rev. 2020-October); 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]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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

[ show close-approach data ]
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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