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6136 Gryphon (1990 YH)
Classification: Main-belt Asteroid          SPK-ID: 2006136
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05925154766096166 1.9916e-08  
a 3.02245596192657 1.2978e-08 au
q 2.84337076844532 6.6203e-08 au
i 11.20417159534478 4.8465e-07 deg
node 135.853266853144 5.2777e-06 deg
peri 325.2833862672309 1.8581e-05 deg
M 259.5752889347473 2.0504e-05 deg
tp 2459735.897685793873
(2022-Jun-05.39768579)
0.00011057 TDB
period 1919.2802731646
5.25
1.2362e-05
3.385e-08
d
yr
n .1875703121808338 1.2081e-09 deg/d
Q 3.20154115540782 1.3747e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2878  
   data-arc span      25840 days (70.75 yr)  
   first obs. used      1950-04-22  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 18:22:30  

Additional Information
 Earth MOID = 1.86723 au 
 Jupiter MOID = 1.88416 au 
 T_jup = 3.214 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457082.5 (2015-Mar-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05820421699207091 2.0134e-08  
q 2.849286604344944 6.6795e-08 au
tp 2457790.114914208894
(2017-Feb-05.61491421)
0.00010607 TDB
node 136.0847613713505 5.303e-06 deg
peri 320.6611570778478 1.8468e-05 deg
i 11.17648781330852 4.841e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2878  
   data-arc span      25840 days (70.75 yr)  
   first obs. used      1950-04-22  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 18:22:30  

Additional Information
 Jupiter MOID = 1.88416 au 
 T_jup = 3.214 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.053781166482149E-16 -1.326198808526165E-15 -9.56806277056959E-13 2.890413190089103E-14 -1.628435753342705E-13 2.383491092690438E-15
q -1.326198808526165E-15 4.461580846364833E-15 3.24320910229001E-12 -8.832117502414156E-14 5.398748377780599E-13 -7.523628030552815E-15
tp -9.56806277056959E-13 3.24320910229001E-12 1.125131100416959E-8 6.473770365888167E-11 1.884277559934748E-9 -9.249726874650908E-13
node 2.890413190089103E-14 -8.832117502414156E-14 6.473770365888167E-11 2.812222349266503E-11 -1.365477437652511E-11 2.226542253729037E-12
peri -1.628435753342705E-13 5.398748377780599E-13 1.884277559934748E-9 -1.365477437652511E-11 3.410783154338903E-10 -2.100215503427108E-12
i 2.383491092690438E-15 -7.523628030552815E-15 -9.249726874650908E-13 2.226542253729037E-12 -2.100215503427108E-12 2.343565557963359E-13

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 11.75   n/a MPCxxxxx  
diameter diameter 15.583 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.476 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2016) Astron. Astrophys., submitted.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2018) Icarus 299, 84-96.]
geometric albedo albedo 0.185   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

6136 Gryphon           Discovered 1990 Dec. 22 by A. Natori and T. Urata at the JCPM Yakiimo Station.
In Lewis Carroll's Alice's adventures in Wonderland, the Gryphon had an eagle's head, a front half with wings and talons, and at the back a lion's legs and tail. Unfortunately, Alice did not quite like the look of the creature. The Gryphon appears to have been a friend of the Mock Turtle.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1990 YH = 1986 CE1 
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