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66391 Moshup (1999 KW4)
Classification: Aten [NEO, PHA]          SPK-ID: 2066391
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 349 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6883655944250087 5.9689e-09  
a .6423650667612094 6.1047e-10 au
q .2001830557422691 3.8503e-09 au
i 38.87991325645593 8.3247e-07 deg
node 244.9016457198844 4.699e-07 deg
peri 192.6452136840872 1.7248e-06 deg
M 152.0353762833201 6.4621e-06 deg
tp 2459317.083004662029
(2021-Apr-12.58300466)
3.2677e-06 TDB
period 188.0491173869396
0.51
2.6807e-07
7.339e-10
d
yr
n 1.914393457424452 2.729e-09 deg/d
Q 1.08454707778015 1.0307e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -4.963669833704198E-15 4.822E-16
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      3686  
   # delay obs. used      37  
   # Doppler obs. used      0  
   data-arc span      8486 days (23.23 yr)  
   first obs. used      1998-05-29  
   last obs. used      2021-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .28694  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-23 05:48:47  

Additional Information
 Earth MOID = .0133541 au 
 Jupiter MOID = 4.22366 au 
 T_jup = 8.497 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ hide covariance matrix ]
Orbital Elements at Epoch 2451544.5 (2000-Jan-01.0) TDB
Reference: JPL 349 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .688320105758952 6.0465e-09  
q .2002013047611178 3.8894e-09 au
tp 2451608.476778850027
(2000-Mar-04.97677885)
1.898e-06 TDB
node 244.9476096068127 4.6951e-07 deg
peri 192.5924657414098 1.7202e-06 deg
i 38.89610389561371 8.3153e-07 deg

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -4.963669833704198E-15 4.822E-16
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      3686  
   # delay obs. used      37  
   # Doppler obs. used      0  
   data-arc span      8486 days (23.23 yr)  
   first obs. used      1998-05-29  
   last obs. used      2021-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .28694  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-23 05:48:47  

Additional Information
 Jupiter MOID = 4.22366 au 
 T_jup = 8.497 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
Orbit Covariance (7×7)
  e q tp node peri i A2
e 3.655971361443343E-17 -2.350212777754273E-17 2.273423919808156E-16 1.403699057081807E-15 -3.665998291139728E-15 -2.208309571045131E-15 -1.710861588283172E-25
q -2.350212777754273E-17 1.512772377329678E-17 -3.863344141674824E-16 -8.529957791622765E-16 2.163449163594211E-15 1.423120757363586E-15 4.280562181488377E-26
tp 2.273423919808156E-16 -3.863344141674824E-16 3.602554097132328E-12 -7.618123411386491E-13 3.016737931687649E-12 -3.975447713386444E-13 8.486117438544478E-22
node 1.403699057081807E-15 -8.529957791622765E-16 -7.618123411386491E-13 2.204381234900872E-13 -7.970679785547245E-13 1.753957579212476E-14 -1.823394820033804E-22
peri -3.665998291139728E-15 2.163449163594211E-15 3.016737931687649E-12 -7.970679785547245E-13 2.959185534484784E-12 -1.690499574346533E-13 7.060932622745667E-22
i -2.208309571045131E-15 1.423120757363586E-15 -3.975447713386444E-13 1.753957579212476E-14 -1.690499574346533E-13 6.914412279285549E-13 -1.478713748338204E-23
A2 -1.710861588283172E-25 4.280562181488377E-26 8.486117438544478E-22 -1.823394820033804E-22 7.060932622745667E-22 -1.478713748338204E-23 2.32500775105599E-31

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 16.59   n/a MPO636968  
diameter diameter 1.317 km 0.040 Ostro et al. 2006, Science 314, 1276-1280. Equivalent volume sphere diameter. For Beta, 0.451 km +/- 6% equivalent volume sphere diameter.
extent extent 1.532 x 1.495 x 1.347 km 3% Ostro et al. 2006, Science 314, 1276-1280. Beta: 0.571 x 0. 463 x 0.349 km (6% uncertainty)
bulk density density 1.974 g/cm^3 .24 Ostro et al. 2006, Science 314, 1276-1280. Porosity of Alpha ~50%. Satellite "Beta" bulk density is 2.81 +0.82-0.63 g/cm^3 with porosity < 44%.
rotation period rot_per 2.7645 h 0.0003 Ostro et al. 2006, Science 314, 1276-1280. Radar-confirmed binary object; satellite "Beta" average rotation synchronous with orbit period of ~17.4 hours.
SMASSII spectral type spec_B S:   n/a Binzel et al. (2004) Icarus 170, 259-294 SMASSIR data only, classification consistent with specified type, but uncertain

66391 Moshup           Discovered 1999 May 20 by LINEAR at Socorro.
Moshup was a giant who lived in the coastal areas of New England, according to Native American legends, and was responsible for a variety of geologic features. As a way of maintaining balance, he married Granny Squannit, a leader of the Makiawasug, or Little People, who lived nearby. Squannit was a medicine woman of the Makiawasug who married the giant Moshup. Bad weather was attributed to times when the pair would argue. Moshup is the name of the primary, Squannit that for the satellite.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2019-08-27Last Updated: 2019-09-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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