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363027 (1998 ST27)
Classification: Aten [NEO, PHA]          SPK-ID: 2363027
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5299847367577882 1.414e-07  
a .8193631748252406 4.2256e-09 au
q .3851131983064598 1.1413e-07 au
i 21.06000330788257 1.1122e-05 deg
node 197.5421090407871 5.6387e-06 deg
peri 322.4698210971581 7.4021e-06 deg
M 216.8475971540329 2.0101e-05 deg
tp 2459308.223196077423
(2021-Apr-03.72319608)
1.582e-05 TDB
period 270.9025473334185
0.74
2.0957e-06
5.738e-09
d
yr
n 1.328891158623633 1.028e-08 deg/d
Q 1.253613151344021 6.4652e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] 2.029333891966252E-14 3.895E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      407  
   # delay obs. used      6  
   # Doppler obs. used      1  
   data-arc span      7309 days (20.01 yr)  
   first obs. used      1998-09-24  
   last obs. used      2018-09-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38028  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 09:41:47  

Additional Information
 Earth MOID = .00943652 au 
 Jupiter MOID = 3.76278 au 
 T_jup = 6.979 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ 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 19.5   n/a MPO260882  
diameter diameter 0.578 km 0.228 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 3. 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:
[Benner, L.A.M.; Nolan, M.C.; Ostro, S.J.; Giorgini, J.D.; Margot, J.-L. (2001) IAUC 7730.]
geometric albedo albedo 0.059   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

363027 (1998 ST27)          Discovered 1998-Sep-24 by LINEAR at Socorro
Reference: Last Updated: 2013-06-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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