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48495 Ryugado (1993 BB)
Classification: Main-belt Asteroid          SPK-ID: 2048495
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1395555725345142 4.6433e-08  
a 2.297479817575477 5.4807e-09 au
q 1.97685370624724 1.0628e-07 au
i 5.802150118316498 4.2414e-06 deg
node 144.5784850117567 3.082e-05 deg
peri 24.41023750435023 3.2551e-05 deg
M 34.91979343483201 9.3981e-06 deg
tp 2459273.119891003544
(2021-Feb-27.61989100)
3.3184e-05 TDB
period 1271.96741073557
3.48
4.5515e-06
1.246e-08
d
yr
n .2830261191926408 1.0128e-09 deg/d
Q 2.618105928903714 6.2456e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1475  
   data-arc span      24156 days (66.14 yr)  
   first obs. used      1955-05-17  
   last obs. used      2021-07-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49481  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:59:09  

Additional Information
 Earth MOID = .986069 au 
 Jupiter MOID = 2.35029 au 
 T_jup = 3.574 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457408.5 (2016-Jan-21.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1394851961969888 4.6566e-08  
q 1.977386752333342 1.066e-07 au
tp 2458001.981837303783
(2017-Sep-05.48183730)
3.3235e-05 TDB
node 144.6206918649403 3.0819e-05 deg
peri 24.62681392822628 3.2543e-05 deg
i 5.802015538946947 4.2421e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1475  
   data-arc span      24156 days (66.14 yr)  
   first obs. used      1955-05-17  
   last obs. used      2021-07-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49481  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:59:09  

Additional Information
 Jupiter MOID = 2.35029 au 
 T_jup = 3.574 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.168363965715057E-15 -4.95903275993841E-15 2.634566392650289E-13 1.889831495994405E-14 8.378398998887191E-14 -1.398192005508519E-15
q -4.95903275993841E-15 1.136325064013478E-14 -6.2159979129299E-13 -4.325388490851419E-14 -2.008776732906571E-13 3.274510688080848E-15
tp 2.634566392650289E-13 -6.2159979129299E-13 1.104567606503951E-9 2.605959450281956E-12 3.551212280646772E-10 2.253398457053874E-13
node 1.889831495994405E-14 -4.325388490851419E-14 2.605959450281956E-12 9.498261283970112E-10 -9.435329768402186E-10 6.050674072899188E-11
peri 8.378398998887191E-14 -2.008776732906571E-13 3.551212280646772E-10 -9.435329768402186E-10 1.059030826999223E-9 -6.018289367515079E-11
i -1.398192005508519E-15 3.274510688080848E-15 2.253398457053874E-13 6.050674072899188E-11 -6.018289367515079E-11 1.799557993933033E-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 15.44   n/a MPO636745  
diameter diameter 1.917 km 0.267 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.400   0.123 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48495 Ryugado           Discovered 1993 Jan. 16 by T. Seki at Geisei.
Ryugado, in Kochi prefecture, is one of the Three Greatest Limestone Caves of Japan and has been designated a National Historic Site, as well as a National Natural Treasure. Earthenware from the Yayoi Period (300 B.C.-A.D. 300), evidence of cave dwelling, was uncovered in this 4-km-long cave.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070730/MPCPages.arcLast Updated: 2007-08-07

Alternate Designations
 1993 BB = 1999 YH16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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