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(2015 XY261)
Classification: Apollo [NEO]          SPK-ID: 3736517
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4649407239328642 0.00013867  
a 1.494545337874484 0.00031668 au
q .799670346532634 3.7806e-05 au
i 1.589945957848331 8.7409e-05 deg
node 86.90792557582148 0.00084816 deg
peri 61.94753179790154 0.00071863 deg
M 241.5385279506827 0.3041 deg
tp 2459420.102202912230
(2021-Jul-24.60220291)		 0.63353 TDB
period 667.3629128590462
1.83		 0.21212
0.0005808		 d
yr
n .5394366289515936 0.00017145 deg/d
Q 2.189420329216333 0.00046392 au
   Orbit Determination Parameters
   # obs. used (total)      41  
   data-arc span      9 days  
   first obs. used      2015-12-06  
   last obs. used      2015-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .34279  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:29:56  

Additional Information
 Earth MOID = .0018106 au 
 Jupiter MOID = 2.82084 au 
 T_jup = 4.430 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457367.5 (2015-Dec-11.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .468554428415805 0.00013722  
q .8024317952554864 3.9535e-05 au
tp 2457417.356980115840
(2016-Jan-29.85698012)		 0.0034045 TDB
node 88.13136438249727 0.00015834 deg
peri 60.07296399211624 0.00056114 deg
i 1.213692055291268 0.00030369 deg
   Orbit Determination Parameters
   # obs. used (total)      41  
   data-arc span      9 days  
   first obs. used      2015-12-06  
   last obs. used      2015-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      6  
   norm. resid. RMS      .34279  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:29:56  

Additional Information
 Jupiter MOID = 2.82084 au 
 T_jup = 4.430 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.882937849690473E-8 -5.424889145006731E-9 -4.671626134442595E-7 1.614667693269861E-8 7.480243852808097E-8 4.162293152983753E-8
q -5.424889145006731E-9 1.563011695137234E-9 1.34587972294609E-7 -4.639354653026737E-9 -2.157500474953603E-8 -1.199351046545727E-8
tp -4.671626134442595E-7 1.34587972294609E-7 1.159091733300939E-5 -4.015089122439725E-7 -1.853967395994405E-6 -1.032555576778373E-6
node 1.614667693269861E-8 -4.639354653026737E-9 -4.015089122439725E-7 2.507292703666715E-8 5.074539596834279E-8 3.41608062598949E-8
peri 7.480243852808097E-8 -2.157500474953603E-8 -1.853967395994405E-6 5.074539596834279E-8 3.148783537653389E-7 1.671702264783007E-7
i 4.162293152983753E-8 -1.199351046545727E-8 -1.032555576778373E-6 3.41608062598949E-8 1.671702264783007E-7 9.222986806273429E-8

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 27.2   n/a MPO358595  

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