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49777 Cappi (1999 XS)
Classification: Main-belt Asteroid          SPK-ID: 2049777
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06790766468828316 3.9095e-08  
a 2.355071083361179 8.5889e-09 au
q 2.195143705915216 8.9776e-08 au
i 4.467616768548282 3.5543e-06 deg
node 237.5825218036122 5.1684e-05 deg
peri 341.6113838986472 5.8544e-05 deg
M 151.2747362268765 2.7646e-05 deg
tp 2458645.786978866339
(2019-Jun-11.28697887)
0.00010158 TDB
period 1320.09278342829
3.61
7.2215e-06
1.977e-08
d
yr
n .2727081039448435 1.4918e-09 deg/d
Q 2.514998460807142 9.1722e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1078  
   data-arc span      10686 days (29.26 yr)  
   first obs. used      1991-09-13  
   last obs. used      2020-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50352  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 05:02:45  

Additional Information
 Earth MOID = 1.18607 au 
 Jupiter MOID = 2.45907 au 
 T_jup = 3.548 
[ 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 15.69   n/a E2021B10  
rotation period rot_per 5.939 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

49777 Cappi           Discovered 1999 Dec. 2 by P. G. Comba at Prescott.
Margaret Capitola Sonntag Comba (b. 1940) is the discoverer's second wife and the joy and comfort of his old age. She is a psychologist and art therapist by profession and a faculty member at Prescott College.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040504/MPCPages.arcLast Updated: 2004-05-11

[ show close-approach data ]
Alternate Designations
 1999 XS = 2001 KD31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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