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532 Herculina (A904 HE)
Classification: Main-belt Asteroid          SPK-ID: 2000532
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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1757798063353395 2.6185e-08  
a 2.774642775783341 4.3592e-09 au
q 2.286916606006396 7.2804e-08 au
i 16.31595074721087 3.0298e-06 deg
node 107.5298657430752 1.0712e-05 deg
peri 76.50307383906339 1.4001e-05 deg
M 69.38906946777008 1.0698e-05 deg
tp 2458675.114942140019
4.9855e-05 TDB
period 1688.142264020442
n .2132521693655321 5.0256e-10 deg/d
Q 3.262368945560285 5.1255e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3713  
   data-arc span      42523 days (116.42 yr)  
   first obs. used      1904-04-20  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44839  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:28:35  

Additional Information
 Earth MOID = 1.35461 au 
 Jupiter MOID = 1.96274 au 
 T_jup = 3.255 
[ 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 5.9   n/a MPO492755 IRAS observations used: 16
magnitude slope G 0.26   n/a PDS3 (MPC 17259) Fit
diameter diameter 167.791 km 0.890 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 9.405 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Chang, Y.C.; Chang, C.-s. (1963) Acta Astron. Sin. 11, 139-149.]
[Harris, A.W.; Young, J. (1979) Icarus 38, 100-105.]
[Taylor, R.C.; Birch, P.V.; Drummond, J.; Pospieszalska-Surdej, A.; Surdej, J. (1987) Icarus 69, 354-369.]
[Kwiatkowski, T, Michalowski, T. (1992) In Asteroids, Comets, Meteors 1991 (A.W. Harris, E. Bowell, Eds.), pp 333-336, Lunar and Planetary Institute.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Michalowski, T.; Velichko, F.P.; Di Martino, M.; Krugly, et al. (1995) Icarus 118, 292-301.]
[Szabo, Gy.; Sarneczky, K.; Kiss, L.L. (1999) in Proc. IAU Coll. 173, Evolution and Source Regions of Asteroids and Comets, 185-188.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.]
[Behrend, R. (2005) Observatoire de Geneve web site,]
[Behrend, R. (2010) Observatoire de Geneve web site,]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Behrend, R. (2017) Observatoire de Geneve web site,]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.285   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.857   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=15; phase (min.=4.26, mean=11.48, max.=21.07) deg.
U-B UB 0.429   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=4.04, mean=11.15, max.=21.07) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

532 Herculina (A904 HE)          Discovered 1904-Apr-20 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A904 HE = 1950 JP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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