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JPL Small-Body Database Browser
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877 Walkure (A915 RV)
Classification: Main-belt Asteroid          SPK-ID: 2000877
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 74 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1604093384461434 3.1258e-08  
a 2.486568908951937 7.104e-09 au
q 2.087700035266208 7.8072e-08 au
i 4.255512533752059 4.0242e-06 deg
node 116.3750781081413 4.8535e-05 deg
peri 275.8214453386521 5.0451e-05 deg
M 222.7819426418112 1.4558e-05 deg
tp 2459546.393522860388
(2021-Nov-27.89352286)
5.8657e-05 TDB
period 1432.185180385896
3.92
6.1376e-06
1.68e-08
d
yr
n .2513641426613559 1.0772e-09 deg/d
Q 2.885437782637666 8.2436e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3103  
   data-arc span      36110 days (98.86 yr)  
   first obs. used      1921-02-25  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41761  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:43:18  

Additional Information
 Earth MOID = 1.09878 au 
 Jupiter MOID = 2.55241 au 
 T_jup = 3.453 
[ 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 10.9   n/a MPO473774 IRAS observations used: 6
diameter diameter 38.41 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 17.424 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Bin, L.; Haibin, Z.; Jingshen, Y. (2011) Minor Planet Bull. 38, 179-180.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[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 0.0623   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
B-V BV 0.636   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=13.86, mean=18.97, max.=23.50) deg.
U-B UB 0.250   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=13.86, mean=18.97, max.=23.50) deg.
Tholen spectral type spec_T F   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

877 Walkure (A915 RV)          Discovered 1915-Sep-13 by Neujmin, G. at Simeis
Discovered at Simeis during the First World War while Simeis was not in communication with the Rechen-Institut for long periods of time were given provisional designations containing the Greek letter SIGMA. These are here abbreviated S.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A915 RV = A909 GC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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