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35581 (1998 HD40)
Classification: Main-belt Asteroid          SPK-ID: 2035581
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543358220795503 5.464e-08  
a 2.676768252146422 1.1848e-08 au
q 2.263647023434963 1.4206e-07 au
i 8.965598722464952 5.589e-06 deg
node 35.02872349554251 2.3837e-05 deg
peri 168.4784369994138 2.7554e-05 deg
M 18.19022158457182 1.2135e-05 deg
tp 2458919.674188326126
(2020-Mar-11.17418833)
5.3888e-05 TDB
period 1599.611751144012
4.38
1.0621e-05
2.908e-08
d
yr
n .2250546107469734 1.4942e-09 deg/d
Q 3.089889480857881 1.3677e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1030  
   data-arc span      10475 days (28.68 yr)  
   first obs. used      1991-10-13  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56334  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 20:31:01  

Additional Information
 Earth MOID = 1.26051 au 
 Jupiter MOID = 1.86866 au 
 T_jup = 3.344 
[ 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 14.7   n/a MPO468175  
rotation period rot_per 5.40 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

35581 (1998 HD40)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20020227/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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