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JPL Small-Body Database Browser
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2395 Aho (1977 FA)
Classification: Main-belt Asteroid          SPK-ID: 2002395
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04410348854058353 2.8923e-08  
a 3.082609501953189 1.4059e-08 au
q 2.946655669108703 8.9444e-08 au
i .3027544913332964 3.4136e-06 deg
node 100.4574528060404 0.00071325 deg
peri 162.4926702661825 0.00071476 deg
M 253.9171512364474 4.752e-05 deg
tp 2459583.030768373882
(2022-Jan-03.53076837)
0.00026161 TDB
period 1976.861283976461
5.41
1.3524e-05
3.703e-08
d
yr
n .1821068594534156 1.2458e-09 deg/d
Q 3.218563334797676 1.4679e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2659  
   data-arc span      25496 days (69.80 yr)  
   first obs. used      1950-04-17  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48023  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:20:24  

Additional Information
 Earth MOID = 1.93096 au 
 Jupiter MOID = 1.80146 au 
 T_jup = 3.226 
[ 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 12.5   n/a MPO384771  
diameter diameter 20.392 km 0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.88033 h n/a LCDB (Rev. 2019-August); 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.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.034   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2395 Aho (1977 FA)          Discovered 1977-Mar-17 by Harvard College at Agassiz Station
Discovered at Oak Ridge Observatory (until 1981 Harvard College's Agassiz Station). The principal observers are R. E. McCrosky, C.-Y. Shao, G. Schwartz, and J. H. Bulger, with some assistance from others.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1977 FA = 1967 JB = 1974 SS1 = 1977 DC2 = 1979 QO1 = 1982 BN1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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