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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 63 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09904458274566322 2.8926e-08  
a 2.911926912588969 1.0499e-08 au
q 2.623516326545727 8.2355e-08 au
i 17.97835317852605 3.3201e-06 deg
node 160.261783957637 1.0721e-05 deg
peri 202.1284243919553 2.0748e-05 deg
M 95.9776385376809 1.7708e-05 deg
tp 2458516.621092156775
(2019-Feb-02.12109216)
8.9357e-05 TDB
period 1814.96866851096
4.97
9.816e-06
2.687e-08
d
yr
n .1983505314696986 1.0727e-09 deg/d
Q 3.20033749863221 1.1539e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3109  
   data-arc span      31464 days (86.14 yr)  
   first obs. used      1934-09-09  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40795  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:20:02  

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

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