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137170 (1999 HF1)
Classification: Aten [NEO]          SPK-ID: 2137170
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 461 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4624378645509034 5.294e-08  
a .8191679915713351 8.0301e-10 au
q .4403536948406345 4.3504e-08 au
i 25.65989208660635 5.8243e-06 deg
node 155.8666161406173 2.0428e-05 deg
peri 253.4062115589952 1.8133e-05 deg
M 282.0574917743152 1.429e-05 deg
tp 2459059.131332565283
(2020-Jul-28.63133257)
1.0786e-05 TDB
period 270.8057541898072
0.74
3.9819e-07
1.09e-09
d
yr
n 1.329366139493759 1.9547e-09 deg/d
Q 1.197982288302036 1.1743e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3775  
   data-arc span      7724 days (21.15 yr)  
   first obs. used      1999-04-20  
   last obs. used      2020-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .33229  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 02:32:51  

Additional Information
 Earth MOID = .173771 au 
 Jupiter MOID = 4.31363 au 
 T_jup = 6.986 
[ 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 14.6   n/a MPO385596  
rotation period rot_per 2.3192 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Sarounova, L.; Hicks, M.D.; Rabinowitz, D.L.; et al. (2002) Minor Planet Bull. 29, 23-25.]
[Pravec, P.; Sarounova, L.; Hicks, M.D.; Rabinowitz, D.L.; et al. (2002) Icarus 158, 276-280.]
[Polishook, D.; Brosch, N.; Prianik, D. (2005) Abstr. IAU Symp. 229, p. 60-61.]
[Pravec, P.; et al. (2006) Icarus 181, 63-93.]
[Polishook, D.; Brosch, N. (2008) Icarus 194, 111-124.]
[Elenin, L.; Molotov, I. (2012) Minor Planet Bull. 39, 101-102.]
[Marchis, F.; Enriquez, J.E.; Emery, J.P.; Mueller, M.; et al. (2012) Icarus 221, 1130-1161.]
[Warner, B.D. (2016) Minor Planet Bull. 43, 311-319.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]
SMASSII spectral type spec_B X:   n/a Binzel et al. (2004) Icarus 170, 259-294 SMASSIR data only, classification consistent with specified type, but uncertain

137170 (1999 HF1)          Discovered 1999-Apr-20 by LONEOS at Anderson Mesa
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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