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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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 
[ 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 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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