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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 ]

[ show orbit diagram ]
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1900-Sep-22 18:26 00:03 Jupiter 1.88373847004054 1.88373712444171 1.88373981564183 2.78164145289911 2.61500089766167 2415285.267850543 2.65159185736742 139.288298378478 15.0849869150702 70.3290519029562 2455076.6814438 T 33 CATAB v2.0g-lin.ifort 2021-Aug-24 22:04:13 2021-Aug-24 22:04
1951-Sep-21 07:20 00:02 Jupiter 1.86984094496962 1.86984016123693 1.8698417287029 3.03724356014404 2.88424426065798 2433910.805893884 1.52960219785659 82.8828690499555 15.713138147093 79.1313737255556 2492686.56510286 T 33 CATAB v2.0g-lin.ifort 2021-Aug-24 22:04:13 2021-Aug-24 22:04
1961-Jul-27 18:31 00:01 Jupiter 1.62596246405888 1.6259621353651 1.62596279275274 1.79013671376913 1.47061799777059 2437508.271351857 1.31376015527498 123.513868367423 31.2377706700632 73.004122900614 3653222.63457415 T 33 CATAB v2.0g-lin.ifort 2021-Aug-24 22:04:13 2021-Aug-24 22:04
2022-Jul-04 13:13 < 00:01 Jupiter 1.77201055851675 1.7720101698705 1.77201094716289 2.40634586502604 2.19874936488637 2459765.050612288 0.269579789538786 38.228450314421 9.1238146805796 -82.7753571928852 2931139.47969944 T 33 CATAB v2.0g-lin.ifort 2021-Aug-24 22:04:13 2021-Aug-24 22:04
2032-May-09 18:39 < 00:01 Jupiter 1.66360039275241 1.66359999616092 1.66360078934381 1.99299345854026 1.71863971779175 2463362.276842127 0.471847884601449 83.8600403405198 21.7915314188292 78.4606058971997 2795352.25025415 T 33 CATAB v2.0g-lin.ifort 2021-Aug-24 22:04:13 2021-Aug-24 22:04
2093-Apr-12 14:56 00:02 Jupiter 1.69046998131837 1.69046938785124 1.6904705747851 1.90153270977696 1.61669781518769 2485615.122002380 2.0228671000747 95.661762366766 25.357771410842 -66.0355195835486 1846832.95446045 T 33 CATAB v2.0g-lin.ifort 2021-Aug-24 22:04:13 2021-Aug-24 22:04
2103-Feb-23 17:00 00:02 Jupiter 1.74170424678936 1.74170325216226 1.74170524141637 2.28551332838461 2.06177950611908 2489218.208423448 2.13188160850902 86.22018772385 14.0005664198046 81.1579013454921 1467171.23087376 T 33 CATAB v2.0g-lin.ifort 2021-Aug-24 22:04:13 2021-Aug-24 22:04
2164-Jan-22 01:37 00:04 Jupiter 1.63952809478673 1.63952754431983 1.63952864525372 1.61311019033736 1.25254656167875 2511465.567253147 3.80548930796427 162.83431627114 58.9330469916628 -65.4059806834102 2037106.53972989 T 33 CATAB v2.0g-lin.ifort 2021-Aug-24 22:04:13 2021-Aug-24 22:04
2173-Dec-13 14:35 00:04 Jupiter 1.84101928341196 1.84101732707375 1.841021239753 2.62972953169695 2.44853231579917 2515079.107467549 3.73822409983533 164.639107036421 16.9985328723505 70.5331753021181 1839109.5217039 T 33 CATAB v2.0g-lin.ifort 2021-Aug-24 22:04:13 2021-Aug-24 22:04

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