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164121 (2003 YT1)
Classification: Apollo [NEO, PHA]          SPK-ID: 2164121
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 152 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2919991010486883 1.1642e-08  
a 1.109599293046283 6.1141e-10 au
q .7855972969525081 1.3306e-08 au
i 44.06071776263269 1.0247e-06 deg
node 38.32179185385443 5.9383e-07 deg
peri 91.05596780237489 2.2609e-06 deg
M 299.9143755031909 2.7515e-06 deg
tp 2459467.755068595131
(2021-Sep-10.25506860)
3.3141e-06 TDB
period 426.9211630746964
1.17
3.5286e-07
9.661e-10
d
yr
n .8432470234252887 6.9696e-10 deg/d
Q 1.433601289140057 7.8994e-10 au
  Orbit Determination Parameters
   # obs. used (total)      1104  
   # delay obs. used      7  
   # Doppler obs. used      1  
   data-arc span      13367 days (36.60 yr)  
   first obs. used      1982-11-19  
   last obs. used      2019-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32541  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:17:32  

Additional Information
 Earth MOID = .00281574 au 
 Jupiter MOID = 3.84317 au 
 T_jup = 5.324 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455152.5 (2009-Nov-17.0) TDB
Reference: JPL 152 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2919117484982718 1.1659e-08  
q .7858795333504296 1.3325e-08 au
tp 2455197.468224844407
(2009-Dec-31.96822484)
2.1155e-06 TDB
node 38.35543144045556 5.9398e-07 deg
peri 90.9777357258651 2.2764e-06 deg
i 44.06186761553479 1.025e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1104  
   # delay obs. used      7  
   # Doppler obs. used      1  
   data-arc span      13367 days (36.60 yr)  
   first obs. used      1982-11-19  
   last obs. used      2019-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32541  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:17:32  

Additional Information
 Jupiter MOID = 3.84317 au 
 T_jup = 5.324 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.359284602964386E-16 -1.55354235655933E-16 1.454300743235129E-14 1.267044947132719E-15 1.15321593966663E-14 3.854733089096214E-15
q -1.55354235655933E-16 1.77564173213474E-16 -1.647182882580559E-14 -1.498921281175501E-15 -1.300005304579261E-14 -4.388861729967928E-15
tp 1.454300743235129E-14 -1.647182882580559E-14 4.47545976149439E-12 -8.434013265550976E-13 4.72696287025452E-12 7.071773995590121E-13
node 1.267044947132719E-15 -1.498921281175501E-15 -8.434013265550976E-13 3.528083667583731E-13 -1.080052208259618E-12 -9.602167511320941E-14
peri 1.15321593966663E-14 -1.300005304579261E-14 4.72696287025452E-12 -1.080052208259618E-12 5.181990729183541E-12 7.164876831642174E-13
i 3.854733089096214E-15 -4.388861729967928E-15 7.071773995590121E-13 -9.602167511320941E-14 7.164876831642174E-13 1.050541426510563E-12

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 16.21   n/a MPCxxxxx  
diameter diameter 1.717 km 0.550 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2012ApJ...760L..12M)  
rotation period rot_per 2.343 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Larson, S.M.; Grauer, A.D.; Beshore, E.; Christensen, E.; et al. (2004) Bull. Amer. Astron. Soc. 36, 1139.]
[Nolan, M.C.; Howell, E.S.; Hine, A.A.; Galad, A.; et al. (2003) IAUC 8336.]
[Pravec, P.; et al. (2006) Icarus 181, 63-93.]
geometric albedo albedo 0.198   0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2012ApJ...760L..12M)  

164121 (2003 YT1)          Discovered 2003-Dec-18 by CSS at Catalina
Reference: 20070926/Numbers.arcLast Updated: 2007-09-30

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