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4000 Hipparchus (1989 AV)
Classification: Main-belt Asteroid          SPK-ID: 2004000
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1147871481772393 1.6474e-08  
a 2.589024739170118 9.2272e-09 au
q 2.291837972800459 4.1988e-08 au
i 2.720584374570547 4.5698e-07 deg
node 318.4364880892809 1.9863e-05 deg
peri 173.9880431921138 2.1407e-05 deg
M 219.7565053268879 1.242e-05 deg
tp 2459793.265544778551
(2022-Aug-01.76554478)
5.4424e-05 TDB
period 1521.607805179653
4.17
8.1345e-06
2.227e-08
d
yr
n .2365918463184379 1.2648e-09 deg/d
Q 2.886211505539777 1.0286e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2837  
   data-arc span      24158 days (66.14 yr)  
   first obs. used      1954-11-23  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42726  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:49:16  

Additional Information
 Earth MOID = 1.30616 au 
 Jupiter MOID = 2.14689 au 
 T_jup = 3.410 
[ 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 12.88   n/a E2021B10  
diameter diameter 17.485 km 0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.418 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:
[Odden, C.E.; Bond, B.; Aggarwal, A.K.; Yoon, S.; et al. (2014) Minor Planet Bull. 41, 274-275.]
geometric albedo albedo 0.052   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4000 Hipparchus (1989 AV)          Discovered 1989-Jan-04 by Ueda, S. and Kaneda, H. at Kushiro
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1989 AV = 1963 XA = 1975 TW4 = 1977 FZ2 = 1978 NG8 = 1979 WU4 = 1984 YX5 = 1987 SD18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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