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17855 Geffert (1998 KK)
Classification: Main-belt Asteroid          SPK-ID: 2017855
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1408251618213725 3.041e-08  
a 3.104987241474595 1.4887e-08 au
q 2.667726910740639 9.126e-08 au
i 5.184153994875254 3.7272e-06 deg
node 245.0403621678478 3.863e-05 deg
peri 225.8736617887119 4.0975e-05 deg
M 188.2865340062241 1.4478e-05 deg
tp 2460349.713118194769
(2024-Feb-09.21311819)
8.3007e-05 TDB
period 1998.42639343472
5.47
1.4373e-05
3.935e-08
d
yr
n .1801417361093113 1.2956e-09 deg/d
Q 3.542247572208552 1.6984e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2174  
   data-arc span      25456 days (69.69 yr)  
   first obs. used      1951-11-29  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45327  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:04:01  

Additional Information
 Earth MOID = 1.68798 au 
 Jupiter MOID = 1.61875 au 
 T_jup = 3.199 
[ 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 13.03   n/a MPO636333  
diameter diameter 14.754 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.46763 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.062   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17855 Geffert           Discovered 1998 May 19 at the Starkenburg Observatory, Heppenheim.
The German amateur astronomer Martin Geffert (b. 1922) has been very dedicated to the Starkenburg Observatory, being one of the founders and treasurer of the observatory since its beginnings in 1970. He is also an excellent performer on the mandolin.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1998 KK = 1990 WO15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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