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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2341829092732998 1.98e-08  
a 2.590442805990242 7.9019e-09 au
q 1.983805373377357 5.051e-08 au
i 11.5533101413283 1.4628e-06 deg
node 155.8958695199574 2.8729e-06 deg
peri 270.6631788124087 3.745e-06 deg
M 173.0622973573246 3.7174e-06 deg
tp 2458468.418549759170
(2018-Dec-15.91854976)
1.3836e-05 TDB
period 1522.858104342301
4.17
6.968e-06
1.908e-08
d
yr
n .2363975993386977 1.0817e-09 deg/d
Q 3.197080238603127 9.7524e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2582  
   data-arc span      32541 days (89.09 yr)  
   first obs. used      1932-02-14  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44317  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:08:06  

Additional Information
 Earth MOID = 1.03605 au 
 Jupiter MOID = 2.25055 au 
 T_jup = 3.353 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456776.5 (2014-Apr-29.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2329590825099748 1.9752e-08  
q 1.987920127946997 5.0298e-08 au
tp 2456946.124636651152
(2014-Oct-15.62463665)
1.2342e-05 TDB
node 155.9163623743022 2.8717e-06 deg
peri 271.0049953167318 3.7657e-06 deg
i 11.55072619129429 1.4629e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2582  
   data-arc span      32541 days (89.09 yr)  
   first obs. used      1932-02-14  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44317  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:08:06  

Additional Information
 Jupiter MOID = 2.25055 au 
 T_jup = 3.353 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.901597486261572E-16 -9.864219206149841E-16 9.867804252047074E-15 5.328403196817578E-15 -2.854486281921758E-14 -6.629692747752394E-15
q -9.864219206149841E-16 2.52991575200995E-15 -2.926310538062326E-14 -1.51195128058632E-14 7.343585652713577E-14 1.786270726547571E-14
tp 9.867804252047074E-15 -2.926310538062326E-14 1.523279745047489E-10 1.780414594835211E-11 2.893934048088023E-11 -1.213521904869496E-11
node 5.328403196817578E-15 -1.51195128058632E-14 1.780414594835211E-11 8.246618307941073E-12 -2.863433299548966E-12 -2.094221444361857E-12
peri -2.854486281921758E-14 7.343585652713577E-14 2.893934048088023E-11 -2.863433299548966E-12 1.418022504523417E-11 -1.23752620563282E-12
i -6.629692747752394E-15 1.786270726547571E-14 -1.213521904869496E-11 -2.094221444361857E-12 -1.23752620563282E-12 2.140062538112799E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.57   n/a E2021B10  
diameter diameter 17.333 km 4.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 95.883 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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

Alternate Designations
 1932 CD1 = 1953 FR = 1976 QR1 = 1980 RF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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