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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1174804435093517 3.4337e-08  
a 2.166914058305067 7.9938e-09 au
q 1.912344033688739 7.642e-08 au
i 5.339527660267512 4.3021e-06 deg
node 99.71800122033453 4.2282e-05 deg
peri 29.56388791108798 4.7086e-05 deg
M 112.3371950718737 2.1839e-05 deg
tp 2459032.935029142838
(2020-Jul-02.43502914)
7.0034e-05 TDB
period 1165.093978221893
3.19
6.4471e-06
1.765e-08
d
yr
n .3089879500960203 1.7098e-09 deg/d
Q 2.421484082921396 8.9329e-09 au
  Orbit Determination Parameters
   # obs. used (total)      573  
   data-arc span      8574 days (23.47 yr)  
   first obs. used      1997-12-21  
   last obs. used      2021-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53519  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 09:01:02  

Additional Information
 Earth MOID = .930051 au 
 Jupiter MOID = 2.61811 au 
 T_jup = 3.677 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457863.5 (2017-Apr-20.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1169805496137642 3.4253e-08  
q 1.913614392307857 7.6195e-08 au
tp 2457868.430489124147
(2017-Apr-24.93048912)
6.8773e-05 TDB
node 99.74270213879063 4.2303e-05 deg
peri 29.83440834973881 4.7155e-05 deg
i 5.338037710996853 4.3006e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      573  
   data-arc span      8574 days (23.47 yr)  
   first obs. used      1997-12-21  
   last obs. used      2021-06-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53519  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 09:01:02  

Additional Information
 Jupiter MOID = 2.61811 au 
 T_jup = 3.677 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.173251678645907E-15 -2.599303505417279E-15 -9.058671649542234E-13 6.445796916040547E-15 -2.449763351991151E-13 -1.338350394732984E-15
q -2.599303505417279E-15 5.80561843564812E-15 2.064392628821779E-12 -1.43912278041513E-14 5.598935059638082E-13 3.122253916666791E-15
tp -9.058671649542234E-13 2.064392628821779E-12 4.729735458897206E-9 -6.570950613265537E-12 1.445268333271791E-9 6.628906625473382E-12
node 6.445796916040547E-15 -1.43912278041513E-14 -6.570950613265537E-12 1.7895141602804E-9 -1.783331051110898E-9 -7.293092865631375E-11
peri -2.449763351991151E-13 5.598935059638082E-13 1.445268333271791E-9 -1.783331051110898E-9 2.223550664125509E-9 7.465272521708714E-11
i -1.338350394732984E-15 3.122253916666791E-15 6.628906625473382E-12 -7.293092865631375E-11 7.465272521708714E-11 1.849512047232855E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.78   n/a MPO614063  
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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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