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407 Arachne (A895 TB)
Classification: Main-belt Asteroid          SPK-ID: 2000407
[ 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 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07014362189962199 3.0569e-08  
a 2.624640008368175 6.3421e-09 au
q 2.440538251998577 8.0526e-08 au
i 7.521590631812684 4.208e-06 deg
node 294.579986896302 2.3143e-05 deg
peri 82.40180792080621 3.8871e-05 deg
M 165.4930163319522 3.076e-05 deg
tp 2458486.529587373892
(2019-Jan-03.02958737)		 0.00013241 TDB
period 1553.112960548375
4.25		 5.6294e-06
1.541e-08		 d
yr
n .2317925412668572 8.4015e-10 deg/d
Q 2.808741764737773 6.787e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3316  
   data-arc span      44334 days (121.38 yr)  
   first obs. used      1899-09-05  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43196  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:46:19  

Additional Information
 Earth MOID = 1.45375 au 
 Jupiter MOID = 2.54121 au 
 T_jup = 3.387 
[ 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 9.11   n/a E2021B10 IRAS observations used: 27
diameter diameter 95.07 km 5.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 27
rotation period rot_per 22.627 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Aznar, A.M.; Carreno Garcerain, A.; Arce Masego, E.; Brines Rodriques, P.; et al. (2016) Minor Planet Bull. 43, 257-263.]
[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 0.0548   0.007 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 27
B-V BV 0.698   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=11.61, mean=14.85, max.=17.86) deg.
U-B UB 0.376   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=11.61, mean=14.85, max.=17.86) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

407 Arachne (A895 TB)          Discovered 1895-Oct-13 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A895 TB = 1950 UG 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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