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1862 Apollo (1932 HA)
Classification: Apollo [NEO, PHA]          SPK-ID: 2001862
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2455194.5 (2009-Dec-29.0) TDB
Reference: JPL 258 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5599397119036544 1.3341e-08  
a 1.470240738569771 8.8788e-10 au
q .6469945629859971 1.9842e-08 au
i 6.352954818963134 3.5835e-06 deg
node 35.73911824048476 2.2938e-05 deg
peri 285.8483152247537 2.3539e-05 deg
M 144.2236101839237 1.1906e-06 deg
tp 2454933.635508740890
1.924e-06 JED
period 651.1500907064916
n .5528679257487371 5.0082e-10 deg/d
Q 2.293486914153544 1.385e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -3.14053979461181E-15 4.683E-16
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      1444  
   # delay obs. used      8  
   # Doppler obs. used      9  
   data-arc span      31162 days (85.32 yr)  
   first obs. used      1930-12-13  
   last obs. used      2016-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50852  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:36:28  

Additional Information
 Earth MOID = .0257026 au 
 Jupiter MOID = 3.06837 au 
 T_jup = 4.415 
 Nongravitational accels. using nonstandard g(r) = (1 AU/ r)^2 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.25 mag n/a PDS3 (MPC 17263)  
magnitude slope G 0.09   n/a PDS3 (MPC 17263) Fit
diameter diameter 1.5 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
rotation period rot_per 3.065 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Hahn, G. (1983) in Asteroids, Comets, Meteors. C.-I. Lagerkvist, H. Rickman, eds. Uppsala, pp. 35-44.]
[Harris, A.W.; Young, J.W.; Goguen, J.; Hammel, H.B.; Hahn, G. (1987) Icarus 70, 246-256.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Pravec, P.; Wolf, M.; Sarounova, L. (1998)]
[Torppa, J.; Aksnes, K.; Dai, Z.; Grav, T.; et al. (2005) Bul. Amer. Astron. Soc. 37, 643. .html]
[Warner, B.D. (2006) Minor Planet Bul. 33, 39-41.]
[Kaasalainen, M.; Durech, J.; Warner, B.D.; Krugly, Y.N.; Gaftonyuk, N.M. (2007) Nature 446, 420-422.]
[Durech, J.; Vokrouhlicky, D.; Kaasalainen, M.; Weissman, P.; et al. (2008) Astron. Astrophys. 488, 345-350.]
[Higgins, D. (2008) Minor Planet Bul. 35, 30-32.]
[Polishook, D. (2012) Minor Planet Bul. 39, 187-192.]
[Rozitis, B.; Duddy, S.R.; Green, S.F.; Lowry, S.C. (2013) Astron. Astrophys. 555, A20.]
[Warner, Brian D. (2014) Minor Planet Bul. 41, 213-224.]
geometric albedo albedo 0.25   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
B-V BV .819 mag .009 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=8; phase (min.=5.36, mean=19.14, max.=52.03) deg.
U-B UB .481 mag .048 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=5.36, mean=20.96, max.=52.03) deg.
Tholen spectral type spec_T Q   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Q   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1862 Apollo (1932 HA)          Discovered 1932-Apr-24 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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