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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06995513828861384 3.0695e-08  
a 2.625086432012702 6.3783e-09 au
q 2.441448147641689 8.0811e-08 au
i 7.521705810196919 4.2703e-06 deg
node 294.5811360522623 2.3149e-05 deg
peri 82.44647834960001 3.9507e-05 deg
M 119.1023074958281 3.136e-05 deg
tp 2458486.537405645287
(2019-Jan-03.03740565)
0.00013516 TDB
period 1553.509229652649
4.25
5.6619e-06
1.55e-08
d
yr
n .2317334156299109 8.4457e-10 deg/d
Q 2.808724716383715 6.8244e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3184  
   data-arc span      44103 days (120.75 yr)  
   first obs. used      1899-09-05  
   last obs. used      2020-06-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43829  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:13:32  

Additional Information
 Earth MOID = 1.45612 au 
 Jupiter MOID = 2.54081 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 9.1   n/a MPO502156 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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
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
1907-Jul-25 15:27 < 00:01 Eunom 0.036247930024254 0.0362438626088935 0.0362519975045902 2.41301330069973 2.41301314020862 2417782.143427356 0.703996845402235 216.184470711945 26.2217146935286 -20.9203921019019 77247.1105685593 T 46 CATAB v2.0f-lin.ifort 2020-Jun-23 15:13:55 2020-Jun-23 15:14
1932-Jun-18 21:52 00:01 Amphi 0.0426560040122137 0.0426529782848185 0.0426590297567593 2.43335073216246 2.43335067677797 2426877.411427082 1.03506262452115 156.777966358716 24.5299037225919 16.2148526997963 82372.0370400255 T 46 CATAB v2.0f-lin.ifort 2020-Jun-23 15:13:55 2020-Jun-23 15:14
2034-Jul-12 04:52 < 00:01 Amphi 0.0461407967672316 0.0461389038442844 0.0461426896907139 2.4470213515964 2.44702130068088 2464155.702819801 0.825998120967708 94.6373355093551 24.5804732051589 5.1752230453597 76823.7252483744 T 46 CATAB v2.0f-lin.ifort 2020-Jun-23 15:13:55 2020-Jun-23 15:14
2136-Aug-04 16:39 00:01 Amphi 0.0323738881329539 0.0323681679049681 0.0323796083905666 2.41363992489265 2.41363985132181 2501434.193517940 1.18220975092651 289.082445173917 23.7630632720388 -9.81421243216198 38404.9597490303 T 46 CATAB v2.0f-lin.ifort 2020-Jun-23 15:13:55 2020-Jun-23 15:14

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