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JPL Small-Body Database Browser
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974 Lioba (A922 FC)
Classification: Main-belt Asteroid          SPK-ID: 2000974
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1108535573278379 5.7882e-08  
a 2.534555838702705 8.3035e-09 au
q 2.253591307736468 1.4586e-07 au
i 5.45634485063461 4.3709e-06 deg
node 86.67793516348513 4.4396e-05 deg
peri 301.8622661542278 4.7597e-05 deg
M 248.3020315529481 1.7406e-05 deg
tp 2459457.792412749830
(2021-Aug-31.29241275)
7.1706e-05 TDB
period 1473.842997135403
4.04
7.2427e-06
1.983e-08
d
yr
n .2442593958106153 1.2003e-09 deg/d
Q 2.815520369668941 9.224e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2462  
   data-arc span      41319 days (113.13 yr)  
   first obs. used      1906-03-27  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49137  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:16:58  

Additional Information
 Earth MOID = 1.26455 au 
 Jupiter MOID = 2.60191 au 
 T_jup = 3.434 
[ 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 10.4   n/a MPO473775 IRAS observations used: 2
diameter diameter 25.001 km 0.481 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 38.7 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
geometric albedo albedo 0.214   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.912   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.27, mean=12.96, max.=20.65) deg.
U-B UB 0.468   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.27, mean=12.96, max.=20.65) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

974 Lioba (A922 FC)          Discovered 1922-Mar-18 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A922 FC = 1930 DA1 = A906 FG = A916 UO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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