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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1776490657598122 3.9561e-08  
a 2.307860737801529 5.3704e-09 au
q 1.897871433827336 9.1679e-08 au
i 6.190928751732642 4.4129e-06 deg
node 17.54639516716702 2.8778e-05 deg
peri 15.86277739148237 3.0273e-05 deg
M .7297406063727069 1.002e-05 deg
tp 2458997.904154517359
(2020-May-28.40415452)
3.5639e-05 TDB
period 1280.598017418595
3.51
4.4699e-06
1.224e-08
d
yr
n .2811186610499999 9.8125e-10 deg/d
Q 2.717850041775721 6.3244e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3133  
   data-arc span      44506 days (121.85 yr)  
   first obs. used      1898-02-11  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40328  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:27:10  

Additional Information
 Earth MOID = .904608 au 
 Jupiter MOID = 2.7251 au 
 T_jup = 3.558 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456072.5 (2012-May-25.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1783217332275963 3.9811e-08  
q 1.896565834136159 9.2325e-08 au
tp 2456435.793433532354
(2013-May-23.29343353)
3.2573e-05 TDB
node 17.68458686213856 2.872e-05 deg
peri 15.58317759734432 3.0193e-05 deg
i 6.198314811442287 4.4166e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3133  
   data-arc span      44506 days (121.85 yr)  
   first obs. used      1898-02-11  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40328  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:27:10  

Additional Information
 Jupiter MOID = 2.7251 au 
 T_jup = 3.558 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.584947530087008E-15 -3.671364540339541E-15 -3.629661444127137E-13 4.41952947053933E-15 -1.158314324783447E-13 4.065704456580314E-16
q -3.671364540339541E-15 8.523914038262403E-15 8.618777058163825E-13 -1.047565205236164E-14 2.712917766274261E-13 -9.147766069094117E-16
tp -3.629661444127137E-13 8.618777058163825E-13 1.06097579192515E-9 -7.005760068847399E-12 3.09463292169719E-10 -8.726546904841841E-14
node 4.41952947053933E-15 -1.047565205236164E-14 -7.005760068847399E-12 8.248635985613856E-10 -8.213706801711241E-10 -3.908337640417332E-12
peri -1.158314324783447E-13 2.712917766274261E-13 3.09463292169719E-10 -8.213706801711241E-10 9.116364497295737E-10 3.85113661858703E-12
i 4.065704456580314E-16 -9.147766069094117E-16 -8.726546904841841E-14 -3.908337640417332E-12 3.85113661858703E-12 1.950649412469334E-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-August); 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

[ hide close-approach data ]
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
1995-Jun-12 13:14 < 00:01 Hebe 0.0294441977384734 0.029443488821979 0.0294449066693304 7.22084584734355 7.22084581810407 2449881.051335253 0.191606015570219 52.6075448654294 19.6047188717376 52.9569305919754 186253.651589618 T 36 CATAB v2.0f-lin.ifort 2020-Feb-22 15:27:21 2020-Feb-22 15:27

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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