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100685 (1997 YH2)
Classification: Main-belt Asteroid          SPK-ID: 2100685
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1175700605479743 6.1009e-08  
a 2.167079844881663 1.1435e-08 au
q 1.912296136306631 1.3933e-07 au
i 5.339518230528883 4.4921e-06 deg
node 99.7183922653094 4.4104e-05 deg
peri 29.5967841954227 4.8583e-05 deg
M 51.73560226521233 2.3046e-05 deg
tp 2459033.045121402979
(2020-Jul-02.54512140)
7.4006e-05 TDB
period 1165.227689549156
3.19
9.223e-06
2.525e-08
d
yr
n .3089524933442745 2.4454e-09 deg/d
Q 2.421863553456695 1.278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      495  
   data-arc span      8071 days (22.10 yr)  
   first obs. used      1997-12-21  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5459  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:09:25  

Additional Information
 Earth MOID = .929372 au 
 Jupiter MOID = 2.61809 au 
 T_jup = 3.677 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457557.5 (2016-Jun-18.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1170402364269232 6.0995e-08  
q 1.913752443562778 1.3919e-07 au
tp 2457868.238928868598
(2017-Apr-24.73892887)
7.095e-05 TDB
node 99.74511635708822 4.4129e-05 deg
peri 29.75864386989423 4.865e-05 deg
i 5.337799012846721 4.4902e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      495  
   data-arc span      8071 days (22.10 yr)  
   first obs. used      1997-12-21  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5459  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:09:25  

Additional Information
 Jupiter MOID = 2.61809 au 
 T_jup = 3.677 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.720371501495227E-15 -8.478267622211423E-15 -1.786715484421967E-12 1.665295694660029E-15 -3.042272400182383E-13 -5.966025848382574E-15
q -8.478267622211423E-15 1.937467298951744E-14 4.099218384176437E-12 -3.519406701543624E-15 6.973540506055447E-13 1.378753430367204E-14
tp -1.786715484421967E-12 4.099218384176437E-12 5.03396716780765E-9 1.744617541756942E-11 1.443302416091547E-9 1.08666077783549E-11
node 1.665295694660029E-15 -3.519406701543624E-15 1.744617541756942E-11 1.947376389580359E-9 -1.93310477084415E-9 -5.966094265482841E-11
peri -3.042272400182383E-13 6.973540506055447E-13 1.443302416091547E-9 -1.93310477084415E-9 2.366832202608326E-9 6.241384754477011E-11
i -5.966025848382574E-15 1.378753430367204E-14 1.08666077783549E-11 -5.966094265482841E-11 6.241384754477011E-11 2.016195717700669E-11

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 16.7   n/a MPO280442  
rotation period rot_per 2.50 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

100685 (1997 YH2)          Discovered 1997-Dec-21 by Kobayashi, T. at Oizumi
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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