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85982 (1999 HQ6)
Classification: Main-belt Asteroid          SPK-ID: 2085982
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1144920062346238 5.1796e-08  
a 2.691377238685063 1.2403e-08 au
q 2.383236059093809 1.419e-07 au
i 8.904704668024616 5.563e-06 deg
node 2.287165708208377 2.3253e-05 deg
peri 351.5718416688475 2.8102e-05 deg
M 207.1016298702243 1.6896e-05 deg
tp 2460081.452799198421
(2023-May-16.95279920)
7.7613e-05 TDB
period 1612.724893680285
4.42
1.1148e-05
3.052e-08
d
yr
n .2232246810418295 1.5431e-09 deg/d
Q 2.999518418276318 1.3823e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1573  
   data-arc span      8114 days (22.21 yr)  
   first obs. used      1999-03-22  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50722  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:27:29  

Additional Information
 Earth MOID = 1.37806 au 
 Jupiter MOID = 2.43458 au 
 T_jup = 3.345 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457092.5 (2015-Mar-11.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1146900752467753 5.2128e-08  
q 2.382164962029528 1.4295e-07 au
tp 2456848.291518903952
(2014-Jul-09.79151890)
7.012e-05 TDB
node 2.348305563047377 2.3233e-05 deg
peri 350.1052507856674 2.8022e-05 deg
i 8.911977026172458 5.5657e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1573  
   data-arc span      8114 days (22.21 yr)  
   first obs. used      1999-03-22  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50722  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:27:29  

Additional Information
 Jupiter MOID = 2.43458 au 
 T_jup = 3.345 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.717334636793713E-15 -7.430764843518027E-15 4.413196216645715E-14 3.498057598594786E-15 -4.106190813562238E-14 -2.716975081745002E-15
q -7.430764843518027E-15 2.043531779893102E-14 2.038763498264727E-14 -9.458356543074559E-15 1.450210160896775E-13 7.428247621155637E-15
tp 4.413196216645715E-14 2.038763498264727E-14 4.916811136569928E-9 2.024093579549813E-12 1.106448957682915E-9 -1.94695332825089E-12
node 3.498057598594786E-15 -9.458356543074559E-15 2.024093579549813E-12 5.397495738971723E-10 -5.32393845610256E-10 -1.95832830953202E-11
peri -4.106190813562238E-14 1.450210160896775E-13 1.106448957682915E-9 -5.32393845610256E-10 7.852359958459717E-10 1.894206493362763E-11
i -2.716975081745002E-15 7.428247621155637E-15 -1.94695332825089E-12 -1.95832830953202E-11 1.894206493362763E-11 3.097712384430977E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.45   n/a MPCxxxxx  
rotation period rot_per 27.4733 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

85982 (1999 HQ6)          Discovered 1999-Apr-19 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1999 HQ6 = 2001 SK110 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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