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6249 Jennifer (1991 JF1)
Classification: Mars-crossing Asteroid          SPK-ID: 2006249
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1420153977191358 2.4965e-08  
a 1.914417453753755 5.3565e-09 au
q 1.64254069765846 4.96e-08 au
i 28.1071315532065 8.8905e-07 deg
node 221.6865515841924 1.8348e-06 deg
peri 151.5077178868612 1.0076e-05 deg
M 258.9027833404385 1.4419e-05 deg
tp 2459472.200284259635
(2021-Sep-14.70028426)
3.9443e-05 TDB
period 967.5053929807467
2.65
4.0606e-06
1.112e-08
d
yr
n .3720909491686564 1.5616e-09 deg/d
Q 2.18629420984905 6.1172e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2086  
   data-arc span      24450 days (66.94 yr)  
   first obs. used      1954-04-09  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35418  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 22:46:29  

Additional Information
 Earth MOID = .666729 au 
 Jupiter MOID = 3.28412 au 
 T_jup = 3.777 
[ 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 13.03   n/a E2021B10  
rotation period rot_per 4.9566 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D.; Gross, J.; Harris, A.W. (2006) Minor Planet Bull. 33, 23-24.]
[Warner, B.D. (2010) Minor Planet Bull. 37, 161-165.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 27-32.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 102-112.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 267-276.]
SMASSII spectral type spec_B Xe   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

6249 Jennifer (1991 JF1)          Discovered 1991-May-07 by Helin, E. F. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1991 JF1 = 1968 UL1 = 1976 UJ5 = 1978 JE2 = 1994 JL1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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