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3649 Guillermina (1976 HQ)
Classification: Main-belt Asteroid          SPK-ID: 2003649
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04668211820429961 2.0644e-08  
a 3.142133087615758 1.5229e-08 au
q 2.995451659406038 6.3264e-08 au
i 7.164733884685142 1.016e-06 deg
node 118.3050925994626 6.5422e-06 deg
peri 93.69233246144705 2.3545e-05 deg
M 18.17127620918549 2.0552e-05 deg
tp 2459097.812348873061
(2020-Sep-05.31234887)
0.0001161 TDB
period 2034.395051846233
5.57
1.479e-05
4.049e-08
d
yr
n .176956781168582 1.2865e-09 deg/d
Q 3.288814515825478 1.5939e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2527  
   data-arc span      16374 days (44.83 yr)  
   first obs. used      1976-04-26  
   last obs. used      2021-02-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46373  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:22:30  

Additional Information
 Earth MOID = 1.99937 au 
 Jupiter MOID = 1.71879 au 
 T_jup = 3.196 
[ 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 12.25   n/a E2021B10  
diameter diameter 21.854 km 0.334 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.882648 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.054   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3649 Guillermina (1976 HQ)          Discovered 1976-Apr-26 by Felix Aguilar Observatory at El Leoncito
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1976 HQ = 1976 JD2 = 1976 KY1 = 1978 VK12 = 1986 AK1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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