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313 Chaldaea (A891 QB)
Classification: Main-belt Asteroid          SPK-ID: 2000313
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 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .182030370942586 3.1936e-08  
a 2.374572955507042 3.2868e-09 au
q 1.942328559585862 7.5922e-08 au
i 11.65129028168427 3.7088e-06 deg
node 176.5810374884327 1.4545e-05 deg
peri 316.0254228440168 1.6753e-05 deg
M 279.284078242722 9.0419e-06 deg
tp 2459300.163199812870
3.3784e-05 TDB
period 1336.523818151231
n .2693554690989167 5.5925e-10 deg/d
Q 2.806817351428221 3.8851e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3207  
   data-arc span      46648 days (127.72 yr)  
   first obs. used      1893-02-24  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49338  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:41  

Additional Information
 Earth MOID = .97232 au 
 Jupiter MOID = 2.26698 au 
 T_jup = 3.492 
[ 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 9.0   n/a MPO502155 IRAS observations used: 17
diameter diameter 71.183 km 17.773 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 8.392 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Hainaut-Rouelle, M.-C.; Hainaut, O.R.; Detal, A. (1995) Astron. Astrophys. Suppl. Ser. 112, 125-142.]
[Behrend, R. (2003) Observatoire de Geneve web site,]
[Behrend, R. (2004) Observatoire de Geneve web site,]
[Shevchenko, V.G.; Chiorny, V.G.; Gaftonyuk, N.M.; Krugly, Yu.N.; et al. (2005) Abstr. IAU Symp. 229, p. 133.]
[Hawkins, S.; Ditteon, R. (2008) Minor Planet Bull. 35, 1-4.]
[Shevchenko, V.G.; Chiorny, V.G.; Gaftonyuk, M.; Krugly, Y.N.; et al. (2008) Icarus 196, 601-611.]
[Sheridan, E.E. (2009) Minor Planet Bull. 36, 55-56.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Behrend, R. (2015) Observatoire de Geneve web site,]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Behrend, R. (2018) Observatoire de Geneve web site,]
[Carbognani, A.; Cellino, A.; Caminiti, S. (2019) Planet. Space Sci. 169, 15-34.]
geometric albedo albedo 0.044   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.715   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.46, mean=10.74, max.=28.29) deg.
U-B UB 0.342   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=9; phase (min.=3.46, mean=10.34, max.=24.71) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

313 Chaldaea (A891 QB)          Discovered 1891-Aug-30 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2167-Jun-12 07:54 < 00:01 Juno 0.041814184474907 0.0418112737292219 0.0418170954909818 5.34130372629671 5.34130367182449 2512702.828830094 0.148165507255544 224.08207959834 27.8361851800598 -50.1761052876911 173412.4860023 T 96 CATAB v2.0f-lin.ifort 2020-Dec-18 01:52:50 2020-Dec-18 01:52
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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