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1337 Gerarda (1934 RA1)
Classification: Main-belt Asteroid          SPK-ID: 2001337
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 61 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09904458229879422 2.9148e-08  
a 2.911926912906036 1.0572e-08 au
q 2.623516328132641 8.3156e-08 au
i 17.97835324395072 3.3683e-06 deg
node 160.2617842075258 1.0762e-05 deg
peri 202.1284240701507 2.0805e-05 deg
M 95.97763848741016 1.7752e-05 deg
tp 2458516.621092331188
(2019-Feb-02.12109233)
8.9573e-05 TDB
period 1814.968668807396
4.97
9.8841e-06
2.706e-08
d
yr
n .1983505314373022 1.0802e-09 deg/d
Q 3.200337497679432 1.1619e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2951  
   data-arc span      31193 days (85.40 yr)  
   first obs. used      1934-09-09  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41074  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:52:05  

Additional Information
 Earth MOID = 1.62527 au 
 Jupiter MOID = 2.24421 au 
 T_jup = 3.203 
[ 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 11.2   n/a MPO267712  
diameter diameter 40.875 km 0.305 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.52 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.034   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1337 Gerarda (1934 RA1)          Discovered 1934-Sep-09 by Van Gent, H. at Johannesburg (LS)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1934 RA1 = 1942 EE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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