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19392 Oyamada (1998 DW31)
Classification: Main-belt Asteroid          SPK-ID: 2019392
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05944109010431818 3.9368e-08  
a 2.291383409474308 7.0299e-09 au
q 2.155181081768205 8.9098e-08 au
i 6.6390444574152 3.9683e-06 deg
node 316.6166911704082 2.8239e-05 deg
peri 196.7981225566543 3.8014e-05 deg
M 269.4794767077329 2.6767e-05 deg
tp 2459715.058815959426
(2022-May-15.55881596)
9.4736e-05 TDB
period 1266.907984779518
3.47
5.8303e-06
1.596e-08
d
yr
n .2841563904600785 1.3077e-09 deg/d
Q 2.427585737180409 7.4478e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1640  
   data-arc span      11138 days (30.49 yr)  
   first obs. used      1991-02-10  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48994  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:21:16  

Additional Information
 Earth MOID = 1.16745 au 
 Jupiter MOID = 2.56647 au 
 T_jup = 3.587 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457389.5 (2016-Jan-02.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05883437573495295 3.9133e-08  
q 2.156890881099329 8.8505e-08 au
tp 2457177.541455860249
(2015-Jun-04.04145586)
9.2757e-05 TDB
node 316.6657969533262 2.8265e-05 deg
peri 195.9568566656184 3.8379e-05 deg
i 6.635484525444385 3.9657e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1640  
   data-arc span      11138 days (30.49 yr)  
   first obs. used      1991-02-10  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48994  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:21:16  

Additional Information
 Jupiter MOID = 2.56647 au 
 T_jup = 3.587 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.531423835683672E-15 -3.454106399339239E-15 1.13324182148503E-12 -6.296004570860352E-15 3.402660052659121E-13 -1.882696292935358E-15
q -3.454106399339239E-15 7.833177119654516E-15 -2.429928264113557E-12 1.434260123484647E-14 -7.31129878603749E-13 4.460226747390135E-15
tp 1.13324182148503E-12 -2.429928264113557E-12 8.603901375922383E-9 1.23050579687196E-11 2.417134400185758E-9 5.415655889013632E-13
node -6.296004570860352E-15 1.434260123484647E-14 1.23050579687196E-11 7.989154319880179E-10 -7.900300138616246E-10 4.627577059848611E-11
peri 3.402660052659121E-13 -7.31129878603749E-13 2.417134400185758E-9 -7.900300138616246E-10 1.472910700421989E-9 -4.585320741826884E-11
i -1.882696292935358E-15 4.460226747390135E-15 5.415655889013632E-13 4.627577059848611E-11 -4.585320741826884E-11 1.572696735682216E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.91   n/a E2021B10  
diameter diameter 2.288 km 0.364 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.53935 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.535   0.199 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19392 Oyamada           Discovered 1998 Feb. 22 by T. Okuni at Nanyo.
Hiroyuki Oyamada (b. 1970) is an amateur astronomer and a member of the Chokainomori Astronomy Club in Sakata, Yamagata, Japan. He became interested in astronomy around 1979 and has observed Jupiter and solar eclipses since 1994.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111012/MPCPages.arcLast Updated: 2011-10-13

Alternate Designations
 1998 DW31 = 1991 CV3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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