Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.

JPL Small-Body Database Browser
Search: [ help ]  
18874 Raoulbehrend (1999 VZ22)
Classification: Main-belt Asteroid          SPK-ID: 2018874
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.

[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1060156923613954 3.9369e-08  
a 2.273168989799788 7.3286e-09 au
q 2.03217740549171 9.1699e-08 au
i 4.470493850755247 3.7692e-06 deg
node 103.5427788574419 5.4763e-05 deg
peri 274.2152044999855 5.7791e-05 deg
M 28.18518790310615 1.8522e-05 deg
tp 2458902.491341488650
6.4314e-05 TDB
period 1251.83189075698
n .287578550009865 1.3907e-09 deg/d
Q 2.514160574107867 8.1056e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1241  
   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      .54948  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 23:55:34  

Additional Information
 Earth MOID = 1.03967 au 
 Jupiter MOID = 2.91738 au 
 T_jup = 3.600 
[ show covariance matrix ]

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,]

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 ]
FirstGov 2020-Mar-31 11:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin