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19898 (1177 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2019898
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725451330739024 2.1378e-08  
a 3.109832318076201 1.6383e-08 au
q 2.573245886916221 6.9107e-08 au
i 7.529741315778327 7.814e-07 deg
node 283.0822555692153 1.0482e-05 deg
peri 250.5061042203666 1.1333e-05 deg
M 165.5930212660426 8.9623e-06 deg
tp 2458279.110168865390
(2018-Jun-09.61016887)
4.6344e-05 TDB
period 2003.105787142733
5.48
1.5828e-05
4.333e-08
d
yr
n .1797209125502606 1.4201e-09 deg/d
Q 3.646418749236182 1.9209e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1972  
   data-arc span      15803 days (43.27 yr)  
   first obs. used      1977-10-07  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44736  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:08:39  

Additional Information
 Earth MOID = 1.59073 au 
 Jupiter MOID = 1.45791 au 
 T_jup = 3.183 
[ 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 12.95   n/a E2021B10  
diameter diameter 8.855 km 0.631 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.558 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.]
geometric albedo albedo 0.156   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19898 (1177 T-3)          Discovered 1977-Oct-17 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1177 T-3 = 1981 NB = 1998 QW60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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