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18874 Raoulbehrend (1999 VZ22)
Classification: Main-belt Asteroid          SPK-ID: 2018874
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1060157048297452 3.9372e-08  
a 2.273168990024824 7.3488e-09 au
q 2.032177377350222 9.1717e-08 au
i 4.470493245249942 3.7729e-06 deg
node 103.5427497604951 5.4742e-05 deg
peri 274.2152536323424 5.7779e-05 deg
M 28.18517132784221 1.8553e-05 deg
tp 2458902.491399111440
(2020-Feb-22.99139911)
6.442e-05 TDB
period 1251.83189094287
3.43
6.0705e-06
1.662e-08
d
yr
n .2875785499671612 1.3945e-09 deg/d
Q 2.514160602699425 8.1279e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1246  
   data-arc span      23852 days (65.30 yr)  
   first obs. used      1954-08-08  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54494  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:26:48  

Additional Information
 Earth MOID = 1.03967 au 
 Jupiter MOID = 2.91738 au 
 T_jup = 3.600 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456787.5 (2014-May-10.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1067419308144718 3.9495e-08  
q 2.03094595156971 9.2157e-08 au
tp 2456398.443518741324
(2013-Apr-15.94351874)
6.2364e-05 TDB
node 103.5836257892905 5.4785e-05 deg
peri 274.156250280657 5.775e-05 deg
i 4.46901013357059 3.7711e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1246  
   data-arc span      23852 days (65.30 yr)  
   first obs. used      1954-08-08  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54494  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:26:48  

Additional Information
 Jupiter MOID = 2.91738 au 
 T_jup = 3.600 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.55985372386275E-15 -3.631286486485662E-15 -2.74184761432878E-13 7.699487930896282E-15 -8.275976734687933E-14 -4.492368990280039E-16
q -3.631286486485662E-15 8.492993075492846E-15 6.243933793087218E-13 -1.836924215832365E-14 1.916498712714845E-13 1.122655847408897E-15
tp -2.74184761432878E-13 6.243933793087218E-13 3.889236619877798E-9 -2.320426424311557E-11 1.157304541132151E-9 3.398629176503021E-13
node 7.699487930896282E-15 -1.836924215832365E-14 -2.320426424311557E-11 3.001360933596002E-9 -2.998584040955079E-9 2.122587248824584E-11
peri -8.275976734687933E-14 1.916498712714845E-13 1.157304541132151E-9 -2.998584040955079E-9 3.335109144490953E-9 -2.105226602300593E-11
i -4.492368990280039E-16 1.122655847408897E-15 3.398629176503021E-13 2.122587248824584E-11 -2.105226602300593E-11 1.42208327274996E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO344452  
rotation period rot_per 5.3436 h n/a LCDB (Rev. 2019-August); 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:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

18874 Raoulbehrend           Discovered 1999 Nov. 8 by S. Sposetti at Gnosca.
Raoul Behrend (b. 1964) is a Swiss astronomer living in the French-speaking part of Switzerland. He is a specialist in stellar modeling but astrometry and photometry of minor planets are among his interests, too. He also strongly supports the collaboration between professional and amateur astronomers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1999 VZ22 = 1995 ML = 1998 KT39 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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