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JPL Small-Body Database Browser
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2290 Helffrich (1932 CD1)
Classification: Main-belt Asteroid          SPK-ID: 2002290
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2342314898027282 3.9212e-08  
a 2.590489257785144 8.9581e-09 au
q 1.983715099616166 1.0027e-07 au
i 11.55328116242662 3.8257e-06 deg
node 155.8967787128713 2.1188e-05 deg
peri 270.6921990295454 2.2849e-05 deg
M 125.7359495754684 7.4296e-06 deg
tp 2458468.602332739035
(2018-Dec-16.10233274)
3.1578e-05 TDB
period 1522.899066340741
4.17
7.8995e-06
2.163e-08
d
yr
n .236391240862086 1.2262e-09 deg/d
Q 3.197263415954122 1.1056e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2245  
   data-arc span      32131 days (87.97 yr)  
   first obs. used      1932-02-14  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46032  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:17:30  

Additional Information
 Earth MOID = 1.03651 au 
 Jupiter MOID = 2.24978 au 
 T_jup = 3.353 
[ 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 12.6   n/a MPO473796  
diameter diameter 17.333 km 4.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.049   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

2290 Helffrich (1932 CD1)          Discovered 1932-Feb-14 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1932 CD1 = 1953 FR = 1976 QR1 = 1980 RF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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