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JPL Small-Body Database Browser
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24101 Cassini (1999 VA9)
Classification: Main-belt Asteroid          SPK-ID: 2024101
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3074014991151456 3.4835e-08  
a 2.648316672527331 1.2466e-08 au
q 1.834220157260795 9.256e-08 au
i 15.45325260195389 3.9855e-06 deg
node 176.1222411171016 1.4775e-05 deg
peri 256.7587277138932 1.6173e-05 deg
M 257.9694932374147 9.7401e-06 deg
tp 2459446.649942933098
4.4541e-05 TDB
period 1574.176043540073
n .2286910676079258 1.6147e-09 deg/d
Q 3.462413187793868 1.6298e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1679  
   data-arc span      34110 days (93.39 yr)  
   first obs. used      1926-12-07  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46308  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:45:00  

Additional Information
 Earth MOID = .916228 au 
 Jupiter MOID = 2.15161 au 
 T_jup = 3.273 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0   n/a MPO395236  
diameter diameter 7.051 km 0.352 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 3.986 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site,]
[Durkee, R.I. (2011)]
geometric albedo albedo 0.246   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

24101 Cassini           Discovered 1999 Nov. 9 by C. W. Juels at Fountain Hills.
Giovanni Domenico (a.k.a. Jean Dominique) Cassini (1625-1712), an Italian-born French astronomer, was the first director of the Royal Observatory in Paris. He discovered four of the satellites of Saturn, the major gap in its rings, and was the first to record observations of the zodiacal light.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020921/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1999 VA9 = 1926 XH = 1926 YB = 1986 RS16 = 1986 TM15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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