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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 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0990445833195049 2.8934e-08  
a 2.911926912556081 1.0516e-08 au
q 2.623516324845111 8.2394e-08 au
i 17.97835318131962 3.322e-06 deg
node 160.2617842510522 1.0741e-05 deg
peri 202.1284237801817 2.0788e-05 deg
M 95.97763891203753 1.7729e-05 deg
tp 2458516.621090277624
(2019-Feb-02.12109028)
8.9469e-05 TDB
period 1814.968668480211
4.97
9.8316e-06
2.692e-08
d
yr
n .1983505314730589 1.0745e-09 deg/d
Q 3.20033750026705 1.1557e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3057  
   data-arc span      31269 days (85.61 yr)  
   first obs. used      1934-09-09  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40851  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:22:46  

Additional Information
 Earth MOID = 1.62527 au 
 Jupiter MOID = 2.24421 au 
 T_jup = 3.203 
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Orbital Elements at Epoch 2456475.5 (2013-Jul-02.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09863633997380807 2.9135e-08  
q 2.623993068692266 8.2947e-08 au
tp 2456689.398117945722
(2014-Jan-31.89811795)
9.054e-05 TDB
node 160.3461755545025 1.0723e-05 deg
peri 199.7324382793304 2.0857e-05 deg
i 17.99308772641858 3.3265e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3057  
   data-arc span      31269 days (85.61 yr)  
   first obs. used      1934-09-09  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40851  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:22:46  

Additional Information
 Jupiter MOID = 2.24421 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.488643087708527E-16 -2.402270198029914E-15 -2.98877679717681E-13 -3.267398634857765E-15 -7.18193616583586E-14 6.593160803133915E-17
q -2.402270198029914E-15 6.880146131123597E-15 7.922405150859677E-13 9.806102454356828E-15 1.895953675184796E-13 7.835407974476026E-17
tp -2.98877679717681E-13 7.922405150859677E-13 8.197573955562761E-9 3.732831840563638E-12 1.633639246437182E-9 -8.292430429544013E-12
node -3.267398634857765E-15 9.806102454356828E-15 3.732831840563638E-12 1.149848334473067E-10 -1.083577702776116E-10 -3.218764867827657E-12
peri -7.18193616583586E-14 1.895953675184796E-13 1.633639246437182E-9 -1.083577702776116E-10 4.35014377567475E-10 1.422578511405187E-12
i 6.593160803133915E-17 7.835407974476026E-17 -8.292430429544013E-12 -3.218764867827657E-12 1.422578511405187E-12 1.106553504929205E-11

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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