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1093 Freda (1925 LA)
Classification: Main-belt Asteroid          SPK-ID: 2001093
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2712935466823713 1.186e-08  
a 3.130198644749692 1.2066e-08 au
q 2.280995952595196 3.585e-08 au
i 25.20170392110436 6.5077e-07 deg
node 55.61070005764893 2.6844e-06 deg
peri 251.1699474143152 5.9075e-06 deg
M 29.60241171388992 4.2104e-06 deg
tp 2459034.166062158605
(2020-Jul-03.66606216)
2.3158e-05 TDB
period 2022.815512521421
5.54
1.1696e-05
3.202e-08
d
yr
n .1779697643070095 1.029e-09 deg/d
Q 3.979401336904188 1.5339e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3252  
   data-arc span      33612 days (92.02 yr)  
   first obs. used      1929-02-02  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38338  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:58:30  

Additional Information
 Earth MOID = 1.39161 au 
 Jupiter MOID = 1.71134 au 
 T_jup = 3.013 
[ 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 9.04   n/a E2021B10 IRAS observations used: 8
diameter diameter 116.73 km 2.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 19.67 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2008) Minor Planet Bull. 35, 163-167.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.0381   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
B-V BV 0.679   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=7.61, mean=9.88, max.=10.77) deg.
U-B UB 0.356   0.052 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=7.61, mean=9.88, max.=10.77) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

1093 Freda (1925 LA)          Discovered 1925-Jun-15 by Jekhovsky, B. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1925 LA = A898 VE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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