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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 85 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1595183583004932 1.2624e-08  
a 2.487661607185105 6.1835e-09 au
q 2.090833911599771 3.1367e-08 au
i 4.255179109637377 8.5974e-07 deg
node 116.3708940190058 1.0486e-05 deg
peri 275.6070953649556 1.3656e-05 deg
M 322.4153739385336 8.9751e-06 deg
tp 2459546.121193682498
(2021-Nov-27.62119368)
3.6032e-05 TDB
period 1433.129323612535
3.92
5.3434e-06
1.463e-08
d
yr
n .2511985443801654 9.3659e-10 deg/d
Q 2.88448930277044 7.1698e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3850  
   data-arc span      36689 days (100.45 yr)  
   first obs. used      1921-02-25  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38971  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:06:01  

Additional Information
 Earth MOID = 1.10117 au 
 Jupiter MOID = 2.55592 au 
 T_jup = 3.453 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456680.5 (2014-Jan-23.0) TDB
Reference: JPL 85 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1589615720299408 1.2711e-08  
q 2.091376391884032 3.1663e-08 au
tp 2456683.148470610357
(2014-Jan-25.64847061)
3.2096e-05 TDB
node 116.4060403721732 1.0479e-05 deg
peri 276.1137513104551 1.368e-05 deg
i 4.256138024735074 8.6003e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3850  
   data-arc span      36689 days (100.45 yr)  
   first obs. used      1921-02-25  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38971  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:06:01  

Additional Information
 Jupiter MOID = 2.55592 au 
 T_jup = 3.453 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.615745291313405E-16 -3.973365165491135E-16 2.453842130945565E-13 6.696166225646815E-15 3.830771122135379E-14 7.381484842415531E-16
q -3.973365165491135E-16 1.002546220589427E-15 -5.683634837404575E-13 -1.955070767822613E-14 -8.177983864060883E-14 -1.869708724605018E-15
tp 2.453842130945565E-13 -5.683634837404575E-13 1.030183394414123E-9 -7.705450367869386E-11 2.910702365992869E-10 -3.856638937259642E-12
node 6.696166225646815E-15 -1.955070767822613E-14 -7.705450367869386E-11 1.098032759380653E-10 -1.25776667702884E-10 1.371920033841709E-12
peri 3.830771122135379E-14 -8.177983864060883E-14 2.910702365992869E-10 -1.25776667702884E-10 1.871455463208571E-10 -2.348441914442034E-12
i 7.381484842415531E-16 -1.869708724605018E-15 -3.856638937259642E-12 1.371920033841709E-12 -2.348441914442034E-12 7.396470610006788E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.90   n/a MPO636074 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. 2020-October); 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]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Li, B.; Zhao, H.; Yao, J. (2011) Minor Planet Bull. 38, 179-180.]
[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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