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864 Aase (A921 SB)
Classification: Main-belt Asteroid          SPK-ID: 2000864
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1901725770527523 1.804e-08  
a 2.208647968618501 4.1733e-09 au
q 1.788623692623995 4.1073e-08 au
i 5.449611562888965 6.2358e-07 deg
node 163.0955175262137 4.203e-06 deg
peri 193.9680103789929 4.692e-06 deg
M 88.28542621564982 5.001e-06 deg
tp 2458906.481475112701
1.6251e-05 TDB
period 1198.914401804913
n .3002716452968084 8.5106e-10 deg/d
Q 2.628672244613008 4.9669e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3118  
   data-arc span      36332 days (99.47 yr)  
   first obs. used      1921-09-30  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45397  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:57:03  

Additional Information
 Earth MOID = .783071 au 
 Jupiter MOID = 2.81552 au 
 T_jup = 3.629 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.85   n/a MPCxxxxx  
diameter diameter 7.249 km 0.351 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 3.2324 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
[Pilcher, F. (2017) Minor Planet Bull. 44, 9.]
[Behrend, R. (2019) Observatoire de Geneve web site,]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.239   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.904   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=17.84, mean=23.32, max.=28.79) deg.
U-B UB 0.534   0.071 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=17.84, mean=23.32, max.=28.79) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

864 Aase (A921 SB)          Discovered 1921-Sep-30 by Reinmuth, K. at Heidelberg
In 1958 A. Patry, Nice, found that planet 864 Aase, discovered 1917 Feb. 13 by M. Wolf, Heidelberg, is identical with 1078 Mentha, discovered 1926 Dec. 7 by K. Reinmuth, Heidelberg. This object retains the latter designation 1078 Mentha. In 1974 the designation 864 Aase was assigned to planet 1921 KE, discovered 1921 Sept. 30 by K. Reinmuth and newly catalogued.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A921 SB = 1944 RC = 1967 RA1 = 1970 PC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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