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1337 Gerarda (1934 RA1)
Classification: Main-belt Asteroid          SPK-ID: 2001337
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09828100429493442 4.5074e-08  
a 2.910191463518263 1.6095e-08 AU
q 2.624174923793143 1.3165e-07 AU
i 17.99530775760825 5.3438e-06 deg
node 160.3457744601112 1.4659e-05 deg
peri 199.8167537925695 2.7975e-05 deg
M 61.69604776544552 2.4566e-05 deg
tp 2456689.732485804996
(2014-Feb-01.23248581)
0.00012361 JED
period 1813.346383799654
4.96
1.5043e-05
4.119e-08
d
yr
n .1985279829690687 1.6469e-09 deg/d
Q 3.196208003243383 1.7676e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1452  
   data-arc span      29272 days (80.14 yr)  
   first obs. used      1934-09-09  
   last obs. used      2014-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49298  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 12:46:03  

Additional Information
 Earth MOID = 1.62447 AU 
 T_jup = 3.204 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.2 mag n/a MPO267712  
diameter diameter 38.86 km 3.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 30
rotation period rot_per 12.52 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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.]
geometric albedo albedo 0.0441   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 30

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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