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120697 (1997 HP1)
Classification: Main-belt Asteroid          SPK-ID: 2120697
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05056062177833603 5.2874e-08  
a 3.13228330231037 2.6739e-08 au
q 2.973913110959657 1.7018e-07 au
i 11.72233144561095 5.69e-06 deg
node 198.100124808676 2.2539e-05 deg
peri 226.6976719163287 6.7091e-05 deg
M 223.1160722471662 6.8707e-05 deg
tp 2459970.409959168601
(2023-Jan-25.90995917)
0.0003923 TDB
period 2024.836588566975
5.54
2.5928e-05
7.099e-08
d
yr
n .1777921250695991 2.2766e-09 deg/d
Q 3.290653493661082 2.8091e-08 au
  Orbit Determination Parameters
   # obs. used (total)      434  
   data-arc span      8514 days (23.31 yr)  
   first obs. used      1997-04-28  
   last obs. used      2020-08-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58715  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:07:43  

Additional Information
 Earth MOID = 1.99692 au 
 Jupiter MOID = 1.92736 au 
 T_jup = 3.179 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457385.5 (2015-Dec-29.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05300635366973393 5.2591e-08  
q 2.963334523957224 1.6909e-07 au
tp 2457953.502818562515
(2017-Jul-19.00281856)
0.0003622 TDB
node 198.1861567861384 2.2526e-05 deg
peri 227.6226558111693 6.4648e-05 deg
i 11.72946781774164 5.6945e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      434  
   data-arc span      8514 days (23.31 yr)  
   first obs. used      1997-04-28  
   last obs. used      2020-08-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58715  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:07:43  

Additional Information
 Jupiter MOID = 1.92736 au 
 T_jup = 3.179 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.765762754172498E-15 -8.790577252091909E-15 -5.551888510657023E-12 -7.802055461971963E-15 -9.400883385291003E-13 7.07804382575521E-15
q -8.790577252091909E-15 2.859026821139854E-14 2.238405649692182E-11 2.144193353895217E-14 3.754962004869064E-12 -2.100157338748192E-14
tp -5.551888510657023E-12 2.238405649692182E-11 1.31190093769174E-7 5.156982540867653E-12 2.197167428130565E-8 1.165663785874391E-12
node -7.802055461971963E-15 2.144193353895217E-14 5.156982540867653E-12 5.074067405906362E-10 -4.956984809887505E-10 3.7894340366892E-11
peri -9.400883385291003E-13 3.754962004869064E-12 2.197167428130565E-8 -4.956984809887505E-10 4.179406938552982E-9 -3.706453561841252E-11
i 7.07804382575521E-15 -2.100157338748192E-14 1.165663785874391E-12 3.7894340366892E-11 -3.706453561841252E-11 3.242739594176656E-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 15.24   n/a E2021B55  
diameter diameter 3.929 km 0.663 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.095   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120697 (1997 HP1)          Discovered 1997-Apr-28 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1997 HP1 = 2005 QB89 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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