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(2015 HB177)
Classification: Apollo [NEO]          SPK-ID: 3719081
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3590668059355974 0.00032687  
a 1.073668296843098 0.00022615 au
q .6881496508613335 0.000206 au
i 1.621331521028916 0.0016536 deg
node 158.7555878541899 0.025967 deg
peri 177.3169923363053 0.030388 deg
M 133.3046552281664 0.49603 deg
tp 2458850.031207314401
(2020-Jan-01.53120731)
0.51235 TDB
period 406.3531410369689
1.11
0.12839
0.0003515
d
yr
n .8859289215319445 0.00027991 deg/d
Q 1.459186942824861 0.00030736 au
  Orbit Determination Parameters
   # obs. used (total)      64  
   data-arc span      13 days  
   first obs. used      2015-04-30  
   last obs. used      2015-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .36199  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:33:59  

Additional Information
 Earth MOID = .0276289 au 
 Jupiter MOID = 3.91409 au 
 T_jup = 5.694 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457147.5 (2015-May-05.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .359220560735555 0.00033024  
q .6882448218434768 0.00020046 au
tp 2457224.975277815174
(2015-Jul-21.47527782)
0.025042 TDB
node 159.6020986963126 0.021168 deg
peri 176.3788067964534 0.0241 deg
i 1.626611369710899 0.0016615 deg
  Orbit Determination Parameters
   # obs. used (total)      64  
   data-arc span      13 days  
   first obs. used      2015-04-30  
   last obs. used      2015-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .36199  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:33:59  

Additional Information
 Jupiter MOID = 3.91409 au 
 T_jup = 5.694 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.090587548449782E-7 -6.619821019546586E-8 -8.269851268782897E-6 6.974213911535079E-6 -7.942044651134118E-6 5.486356861558356E-7
q -6.619821019546586E-8 4.018276273014552E-8 5.019712150827754E-6 -4.232496357922561E-6 4.819821140054093E-6 -3.330068049824279E-7
tp -8.269851268782897E-6 5.019712150827754E-6 .0006271012476941716 -.0005289037161706408 .0006023044170020184 -4.160349766612629E-5
node 6.974213911535079E-6 -4.232496357922561E-6 -.0005289037161706408 .0004480990541555375 -.0005101470965210781 3.511472323786803E-5
peri -7.942044651134118E-6 4.819821140054093E-6 .0006023044170020184 -.0005101470965210781 .0005808130227736292 -3.998594991405995E-5
i 5.486356861558356E-7 -3.330068049824279E-7 -4.160349766612629E-5 3.511472323786803E-5 -3.998594991405995E-5 2.760428909261925E-6

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 24.6   n/a MPO337166  
rotation period rot_per 0.506 h n/a LCDB (Rev. 2019-August); 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:
[Thirouin, A.; Moskovitz, N.A.; Binzel, R.P.; Christensen, E.J.; et al. (2018) Astrophys. J. Supp. Series 2391, A4.]

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