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725 Amanda (A911 UQ)
Classification: Main-belt Asteroid          SPK-ID: 2000725
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2217834764272784 1.692e-08  
a 2.571728699854648 6.1884e-09 au
q 2.001361768373079 4.4324e-08 au
i 3.790330036202206 1.8895e-07 deg
node 68.6737436673184 1.0188e-05 deg
peri 323.3315533465151 1.1497e-05 deg
M 162.3329335952763 4.4783e-06 deg
tp 2458521.233353277991
1.732e-05 TDB
period 1506.38559535672
n .2389826357273087 8.6261e-10 deg/d
Q 3.142095631336216 7.5609e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3478  
   data-arc span      38511 days (105.44 yr)  
   first obs. used      1915-09-29  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41095  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:20:34  

Additional Information
 Earth MOID = 1.00785 au 
 Jupiter MOID = 2.29916 au 
 T_jup = 3.391 
[ 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 11.84   n/a E2021B10 IRAS observations used: 3
diameter diameter 23.687 km 0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 3.749 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Di Martino, M.; Dotto, E.; Barucci, M.A.; Fulchignoni, M.; Rotundi, A. (1994) Icarus 109, 210-218.]
[Behrend, R. (2010) Observatoire de Geneve web site,]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.068   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.738   0.046 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=20.36 deg.
U-B UB 0.417   0.070 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=20.36 deg.
Tholen spectral type spec_T CSU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

725 Amanda (A911 UQ)          Discovered 1911-Oct-21 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
2050-Nov-24 13:20 < 00:01 Hygie 0.0364898572241169 0.0364873709996483 0.036492343452113 4.82392339976347 4.82392318026583 2470135.055468466 0.469928481020028 125.225827503475 38.8119998799577 -9.05344311302089 48342.7299873977 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:22:08 2021-Apr-12 11:22

Alternate Designations
 A911 UQ = 2016 FH6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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