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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 ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09934467642351219 2.889e-08  
a 2.911542791896085 9.6852e-09 au
q 2.622296515341959 8.2178e-08 au
i 17.98166702391115 3.3049e-06 deg
node 160.2578411402731 9.1375e-06 deg
peri 202.1857695218104 1.7976e-05 deg
M 174.4458081369893 1.628e-05 deg
tp 2458517.191583193061
(2019-Feb-02.69158319)
8.1353e-05 TDB
period 1814.609553712613
4.97
9.0544e-06
2.479e-08
d
yr
n .1983897854298494 9.8991e-10 deg/d
Q 3.200789068450211 1.0647e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3663  
   data-arc span      31706 days (86.81 yr)  
   first obs. used      1934-09-09  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3904  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:15:38  

Additional Information
 Earth MOID = 1.62328 au 
 Jupiter MOID = 2.24491 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456968.5 (2014-Nov-07.0) TDB
Reference: JPL 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09828779515597265 2.909e-08  
q 2.624107888260296 8.2786e-08 au
tp 2456689.678909927321
(2014-Feb-01.17890993)
8.1083e-05 TDB
node 160.3462825185844 9.1232e-06 deg
peri 199.8022315013685 1.8105e-05 deg
i 17.99530681828974 3.3091e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3663  
   data-arc span      31706 days (86.81 yr)  
   first obs. used      1934-09-09  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3904  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:15:38  

Additional Information
 Jupiter MOID = 2.24491 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.462186102148617E-16 -2.395931951724652E-15 -2.640761344275737E-13 -2.112994685072816E-15 -6.51057221765435E-14 1.96598039251634E-16
q -2.395931951724652E-15 6.85350109657804E-15 8.268488402050027E-13 6.458930352713552E-15 2.003592440044236E-13 -4.774249928510272E-16
tp -2.640761344275737E-13 8.268488402050027E-13 6.574483853670416E-9 1.846992693504235E-12 1.276640968091955E-9 -6.300417127587055E-12
node -2.112994685072816E-15 6.458930352713552E-15 1.846992693504235E-12 8.323339334638085E-11 -7.859768331230597E-11 -2.871923007823263E-12
peri -6.51057221765435E-14 2.003592440044236E-13 1.276640968091955E-9 -7.859768331230597E-11 3.277909458715158E-10 1.533160644780993E-12
i 1.96598039251634E-16 -4.774249928510272E-16 -6.300417127587055E-12 -2.871923007823263E-12 1.533160644780993E-12 1.095019724971277E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.28   n/a MPO614063  
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. 2020-October); 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

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