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100784 (1998 FM61)
Classification: Main-belt Asteroid          SPK-ID: 2100784
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2108186324646565 3.2997e-08  
a 2.365482853217688 8.8891e-09 au
q 1.866794992983741 8.0678e-08 au
i 4.409348980582357 4.1506e-06 deg
node .3685786499507767 4.4397e-05 deg
peri 264.7624459255654 4.5888e-05 deg
M 86.99325093091441 9.3698e-06 deg
tp 2459075.384556102862
(2020-Aug-13.88455610)
3.4899e-05 TDB
period 1328.85664768149
3.64
7.4904e-06
2.051e-08
d
yr
n .2709095827816391 1.527e-09 deg/d
Q 2.864170713451635 1.0763e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1008  
   data-arc span      8177 days (22.39 yr)  
   first obs. used      1998-03-02  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51807  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 00:00:42  

Additional Information
 Earth MOID = .857504 au 
 Jupiter MOID = 2.24209 au 
 T_jup = 3.514 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457185.5 (2015-Jun-12.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2110306050003471 3.303e-08  
q 1.866448602864717 8.0747e-08 au
tp 2457745.424059814765
(2016-Dec-22.92405981)
3.7032e-05 TDB
node .4197089572556665 4.4432e-05 deg
peri 264.743233708084 4.5916e-05 deg
i 4.408622600491536 4.1475e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1008  
   data-arc span      8177 days (22.39 yr)  
   first obs. used      1998-03-02  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51807  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 00:00:42  

Additional Information
 Jupiter MOID = 2.24209 au 
 T_jup = 3.514 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.090999749991589E-15 -2.658313960715519E-15 -2.571271921628955E-13 1.067910838259361E-14 -5.89505929824962E-14 -2.454354180660163E-15
q -2.658313960715519E-15 6.520048453941336E-15 5.107489979195682E-13 -2.493027177682601E-14 1.056940135222702E-13 6.138060804646271E-15
tp -2.571271921628955E-13 5.107489979195682E-13 1.371387233685134E-9 -1.581098724535934E-11 4.372911868613389E-10 1.218385096812435E-12
node 1.067910838259361E-14 -2.493027177682601E-14 -1.581098724535934E-11 1.974187909365364E-9 -1.972803815353252E-9 6.471299158800406E-11
peri -5.89505929824962E-14 1.056940135222702E-13 4.372911868613389E-10 -1.972803815353252E-9 2.108268487400589E-9 -6.424532079579142E-11
i -2.454354180660163E-15 6.138060804646271E-15 1.218385096812435E-12 6.471299158800406E-11 -6.424532079579142E-11 1.720202459485706E-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 15.73   n/a E2021B55  
diameter diameter 4.582 km 0.192 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.301 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.053   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100784 (1998 FM61)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 FM61 = 1999 TR174 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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