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JPL Small-Body Database Browser
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428 Monachia (A897 WA)
Classification: Main-belt Asteroid          SPK-ID: 2000428
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1777320256100994 3.991e-08  
a 2.309052743726686 5.4673e-09 au
q 1.898660122343585 9.2441e-08 au
i 6.191018250213778 4.4362e-06 deg
node 17.57939363515945 2.8736e-05 deg
peri 15.64996850522714 3.0228e-05 deg
M 248.4974969569071 9.8094e-06 deg
tp 2458997.445901932301
(2020-May-27.94590193)
3.546e-05 TDB
period 1281.590285380417
3.51
4.5518e-06
1.246e-08
d
yr
n .2809010056541905 9.9767e-10 deg/d
Q 2.719445365109788 6.439e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2550  
   data-arc span      44456 days (121.71 yr)  
   first obs. used      1898-02-11  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44718  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:53:20  

Additional Information
 Earth MOID = .904664 au 
 Jupiter MOID = 2.72187 au 
 T_jup = 3.557 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456041.5 (2012-Apr-24.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1783172351939273 4.0092e-08  
q 1.896610900491324 9.2948e-08 au
tp 2456435.780315482730
(2013-May-23.28031548)
3.2514e-05 TDB
node 17.68531134579768 2.8686e-05 deg
peri 15.57643212547654 3.0161e-05 deg
i 6.198337810870399 4.44e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2550  
   data-arc span      44456 days (121.71 yr)  
   first obs. used      1898-02-11  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44718  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:53:20  

Additional Information
 Jupiter MOID = 2.72187 au 
 T_jup = 3.557 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.607387759803453E-15 -3.722277878371333E-15 -3.717235852887179E-13 3.86281991692504E-15 -1.187139845760984E-13 3.432436876022227E-16
q -3.722277878371333E-15 8.639411061711327E-15 8.810705221908113E-13 -9.178830527369587E-15 2.776210803305421E-13 -7.683112846142036E-16
tp -3.717235852887179E-13 8.810705221908113E-13 1.057189598970395E-9 -6.756770517464062E-12 3.089805638092725E-10 -7.038911563453104E-14
node 3.86281991692504E-15 -9.178830527369587E-15 -6.756770517464062E-12 8.228693349226984E-10 -8.19308464237005E-10 -4.40328738656827E-12
peri -1.187139845760984E-13 2.776210803305421E-13 3.089805638092725E-10 -8.19308464237005E-10 9.097111217219691E-10 4.348592057633586E-12
i 3.432436876022227E-16 -7.683112846142036E-16 -7.038911563453104E-14 -4.40328738656827E-12 4.348592057633586E-12 1.971382082577157E-11

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 12.0   n/a MPO452162  
diameter diameter 20.184 km 0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.63384 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 144-155.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Klinglesmith III, D.A. (2017) Minor Planet Bull. 44, 127-129.]
geometric albedo albedo 0.069   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

428 Monachia (A897 WA)          Discovered 1897-Nov-18 by Villiger, W. at Munich
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A897 WA = 1946 UL = 1949 OE = 1953 TN3 = 1974 XU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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