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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09760087153940446 3.9923e-08  
a 2.914897058898859 1.4309e-08 au
q 2.630400565502683 1.132e-07 au
i 17.99220337654552 4.8098e-06 deg
node 160.3339306691127 1.2719e-05 deg
peri 201.0262878785904 2.4971e-05 deg
M 179.3692462303001 2.2635e-05 deg
tp 2456694.811731632424
(2014-Feb-06.31173163)
0.00011372 JED
period 1817.746260658867
4.98
1.3385e-05
3.665e-08
d
yr
n .1980474435796738 1.4583e-09 deg/d
Q 3.199393552295034 1.5705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1811  
   data-arc span      29804 days (81.60 yr)  
   first obs. used      1934-09-09  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46961  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:33:21  

Additional Information
 Earth MOID = 1.6303 au 
 Jupiter MOID = 2.23264 au 
 T_jup = 3.202 
[ 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 LCDB (Rev. 2016-February); 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. (2016) Astron. J. 150, A75.]
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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