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172717 (2004 BS81)
Classification: Main-belt Asteroid          SPK-ID: 2172717
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06213435650029003 4.3409e-08  
a 2.742687922039674 2.3004e-08 au
q 2.572272772922621 1.2636e-07 au
i 7.20441785948571 5.2111e-06 deg
node 81.53293365689987 3.8148e-05 deg
peri 282.5607249081443 5.8528e-05 deg
M 328.5568405094498 4.4585e-05 deg
tp 2459145.406109251312
(2020-Oct-22.90610925)
0.0002059 TDB
period 1659.063534825438
4.54
2.0873e-05
5.715e-08
d
yr
n .2169898816068417 2.73e-09 deg/d
Q 2.913103071156728 2.4433e-08 au
  Orbit Determination Parameters
   # obs. used (total)      437  
   data-arc span      6538 days (17.90 yr)  
   first obs. used      2002-09-05  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58509  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 13:01:55  

Additional Information
 Earth MOID = 1.58239 au 
 Jupiter MOID = 2.38814 au 
 T_jup = 3.335 
[ 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 15.6   n/a MPO436858  

172717 (2004 BS81)          Discovered 2004-Jan-26 by LONEOS at Anderson Mesa
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1906-Jan-08 05:44 00:10 Iris 0.00725005236644296 0.00723562605656598 0.00726463966825392 4.41822482381923 4.41822464435244 2417218.739111513 9.89797313444395 1854.18799002138 52.4842913799129 67.1016782017752 19027.679009431 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 13:02:12 2020-Aug-25 13:02
2078-Sep-22 19:06 00:02 Hygie 0.0281140265949174 0.0280978555559824 0.0281302151596769 4.04425385281941 4.04425351300563 2480299.295577975 1.89150599447794 1369.19418968882 53.0900924352794 54.0314659242151 64026.3989469996 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 13:02:12 2020-Aug-25 13:02
2101-May-14 14:40 00:10 Iris 0.0134006682473911 0.0133912882084464 0.0134101190986359 4.34127805220797 4.34127795339158 2488568.111173956 9.71514141211052 1614.46756613933 51.5639974021739 -73.1981251699726 37201.2223682131 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 13:02:12 2020-Aug-25 13:02
2129-Feb-26 08:50 00:08 Amphi 0.0367453706199208 0.0367122604585909 0.0367785154731477 2.90820175889225 2.90820170509675 2498717.868209885 8.01838307862392 2426.88394295374 44.0074702528265 47.1638647475626 91520.4540592367 T 20 CATAB v2.0f-lin.ifort 2020-Aug-25 13:02:12 2020-Aug-25 13:02

Alternate Designations
 2004 BS81 = 2005 HK2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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