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270 Anahita (A887 TA)
Classification: Main-belt Asteroid          SPK-ID: 2000270
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 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1506103199578238 3.1121e-08  
a 2.198207942067899 3.5485e-09 au
q 1.867135140579224 6.8473e-08 au
i 2.368268431206513 3.5076e-06 deg
node 254.3499696097827 7.1798e-05 deg
peri 80.61639008427099 7.2781e-05 deg
M 282.5110578619438 1.2427e-05 deg
tp 2459256.735215871882
(2021-Feb-11.23521587)
4.1411e-05 TDB
period 1190.423758134834
3.26
2.8825e-06
7.892e-09
d
yr
n .3024133192402436 7.3226e-10 deg/d
Q 2.529280743556575 4.0829e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2839  
   data-arc span      44758 days (122.54 yr)  
   first obs. used      1897-11-23  
   last obs. used      2020-06-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48785  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:10:27  

Additional Information
 Earth MOID = .858988 au 
 Jupiter MOID = 2.81692 au 
 T_jup = 3.651 
[ 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 8.8   n/a MPO473764 IRAS observations used: 17
diameter diameter 51.400 km 1.495 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 15.06 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Erikson, A.; Mottola, S.; Lagerros, J.S.V.; Lindgren, M.; et al. (2000) Icarus 147, 487-497.]
[Tungalag, N.; Shevchenko, V.G.; Lupishko, D.F. (2002) Kin. Fiz. Neb. Tel 18, 508-516; Kinematics and Physics of Celestial Bodies 18, ???-???.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.211   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.866   0.010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=10.43, mean=11.31, max.=12.53) deg.
U-B UB 0.530   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=10.43, mean=11.31, max.=12.53) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

270 Anahita (A887 TA)          Discovered 1887-Oct-08 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A887 TA = 1926 VG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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