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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 114 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2431038925204059 3.5826e-08  
a 2.585145143140131 5.2347e-09 au
q 1.956686296112543 9.2125e-08 au
i 11.93881569630255 3.5091e-06 deg
node 255.2168582319588 1.8347e-05 deg
peri 308.8632868084159 1.9505e-05 deg
M 99.30711965262199 8.9479e-06 deg
tp 2458581.702858136341
(2019-Apr-08.20285814)
3.7293e-05 TDB
period 1518.188943534994
4.16
4.6113e-06
1.263e-08
d
yr
n .2371246355949385 7.2024e-10 deg/d
Q 3.213603990167719 6.5073e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2798  
   data-arc span      44342 days (121.40 yr)  
   first obs. used      1899-06-22  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44028  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:53:23  

Additional Information
 Earth MOID = .975266 au 
 Jupiter MOID = 1.88028 au 
 T_jup = 3.351 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455177.5 (2009-Dec-12.0) TDB
Reference: JPL 114 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2445403435709602 3.5863e-08  
q 1.951969254459996 9.2241e-08 au
tp 2455545.532234968392
(2010-Dec-15.03223497)
3.5209e-05 TDB
node 255.2985621155102 1.8327e-05 deg
peri 309.0198744274385 1.9459e-05 deg
i 11.94975892029271 3.5137e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2798  
   data-arc span      44342 days (121.40 yr)  
   first obs. used      1899-06-22  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44028  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:53:23  

Additional Information
 Jupiter MOID = 1.88028 au 
 T_jup = 3.351 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.286189557978608E-15 -3.305237066863453E-15 6.1191257925899E-14 4.535140193279932E-15 2.322504880611574E-15 1.608629348386018E-15
q -3.305237066863453E-15 8.508424208859223E-15 -1.530615781577863E-13 -1.244420498000886E-14 -5.856292556447654E-15 -4.291006303558362E-15
tp 6.1191257925899E-14 -1.530615781577863E-13 1.239700226883412E-9 -1.010711885960506E-12 2.518610476998411E-10 2.907482456147802E-13
node 4.535140193279932E-15 -1.244420498000886E-14 -1.010711885960506E-12 3.358642523604499E-10 -3.283316036985114E-10 -1.508567876895495E-11
peri 2.322504880611574E-15 -5.856292556447654E-15 2.518610476998411E-10 -3.283316036985114E-10 3.786704927529421E-10 1.479796405777986E-11
i 1.608629348386018E-15 -4.291006303558362E-15 2.907482456147802E-13 -1.508567876895495E-11 1.479796405777986E-11 1.234643483230311E-11

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 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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