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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05146512277184107 5.275e-08  
a 3.129461870777408 2.6793e-08 au
q 2.968403731388054 1.6945e-07 au
i 11.72625755648285 5.695e-06 deg
node 198.1612193406004 2.2535e-05 deg
peri 226.9896462097292 6.6237e-05 deg
M 187.1918902094492 6.7555e-05 deg
tp 2459971.154210299443
(2023-Jan-26.65421030)		 0.00038674 TDB
period 2022.101370886627
5.54		 2.5968e-05
7.11e-08		 d
yr
n .178032617544862 2.2863e-09 deg/d
Q 3.290520010166762 2.8172e-08 au
   Orbit Determination Parameters
   # obs. used (total)      433  
   data-arc span      8514 days (23.31 yr)  
   first obs. used      1997-04-28  
   last obs. used      2020-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58784  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:55:25  

Additional Information
 Earth MOID = 1.99257 au 
 Jupiter MOID = 1.93206 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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