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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1108536191362005 5.7418e-08  
a 2.534555844517081 7.9549e-09 au
q 2.253591156249554 1.4475e-07 au
i 5.456349315178008 4.2586e-06 deg
node 86.67789513342521 4.3821e-05 deg
peri 301.8623355956179 4.6866e-05 deg
M 248.3020011241182 1.6954e-05 deg
tp 2459457.792538899285
(2021-Aug-31.29253890)
6.9841e-05 TDB
period 1473.843002206989
4.04
6.9386e-06
1.9e-08
d
yr
n .2442593949701035 1.1499e-09 deg/d
Q 2.815520532784609 8.8367e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2610  
   data-arc span      41583 days (113.85 yr)  
   first obs. used      1906-03-27  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48847  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:42:05  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
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
2111-Feb-22 23:22 < 00:01 Eunom 0.0219346997586671 0.0219311609797701 0.0219382398831371 5.83914161194416 5.8391415023435 2492139.473741052 0.355451043036958 325.612422510268 25.6391558635395 57.4727892814498 107986.292967978 T 34 CATAB v2.0f-lin.ifort 2020-Feb-22 15:42:24 2020-Feb-22 15:42

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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