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2153 Akiyama (1978 XD)
Classification: Main-belt Asteroid          SPK-ID: 2002153
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1507526826726128 3.4875e-08  
a 3.129382996126182 1.7478e-08 au
q 2.657620114350101 1.0782e-07 au
i 1.169394181268193 4.4653e-06 deg
node 47.31841314825858 0.0002016 deg
peri 34.74199027490858 0.00020217 deg
M 233.2046134539632 1.732e-05 deg
tp 2459712.676199602810
(2022-May-13.17619960)
9.9276e-05 TDB
period 2022.024924100249
5.54
1.694e-05
4.638e-08
d
yr
n .1780393484319641 1.4916e-09 deg/d
Q 3.601145877902263 2.0113e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2282  
   data-arc span      24061 days (65.88 yr)  
   first obs. used      1954-07-31  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48139  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:41:44  

Additional Information
 Earth MOID = 1.67364 au 
 Jupiter MOID = 1.63381 au 
 T_jup = 3.196 
[ show covariance matrix ]

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 12.0   n/a MPO347535  
diameter diameter 23.166 km 0.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 12.532 h n/a LCDB (Rev. 2019-August); 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.]
geometric albedo albedo 0.057   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2153 Akiyama           Discovered 1978 Dec. 1 at the Harvard College Observatory, Agassiz Station.
Named in memory of Kaoru Akiyama (1901-1970), professor at Hosei Univer sity, Tokyo, during 1930-1940 and 1949-1970, well known for his work on minor planets. Initially in collaboration with K. Hirayama, he made the first de tailed study of the orbit of the 3/2 commensurability object (153) Hilda. Name proposed by K. Tomita.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5014Last Updated: 2006-03-21

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1927-Jul-10 20:24 00:02 Jupiter 1.98258619697581 1.98258517635519 1.98258721759712 3.72610394705183 3.60962441119654 2425072.349940354 1.85997226715084 90.6447852936385 22.3605861673444 67.9491001204937 2407544.95856902 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42
1937-Aug-24 09:20 00:02 Jupiter 1.6684924625418 1.66849194878761 1.66849297629552 1.81445958323236 1.50895620039753 2428769.888711229 1.72909168229921 65.0750875454251 42.7073342147167 -74.6785761337399 1660985.77991827 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42
1947-Oct-07 02:07 00:01 Jupiter 1.78450947715841 1.78450881190185 1.78451014241457 1.8526816302792 1.57579297997874 2432465.588235761 1.44616065581557 63.4281104955903 21.329681009848 -85.4616420789541 1963589.44610404 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42
2009-Aug-16 16:10 < 00:01 Jupiter 1.75521298205776 1.7552125237175 1.75521344039782 2.38917349829077 2.17784281084095 2455060.173433360 0.247169550300347 46.5024792778633 5.97375729911166 -89.7518818913345 2490057.48453346 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42
2019-Sep-24 16:17 < 00:01 Jupiter 1.66687456548754 1.66687420243834 1.66687492853636 1.58039204085639 1.21710260718028 2458751.178158204 0.289325144278307 69.6968967006118 58.6928689988802 72.119415373574 2444541.74032206 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42
2081-Aug-05 04:09 00:02 Jupiter 1.90355350929517 1.90355276637803 1.90355425221264 3.27839962677719 3.13973978024642 2481346.672666418 1.54200472234148 75.9199717098746 18.7274004366014 76.9537429384615 2420708.29840912 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42
2091-Sep-13 09:44 00:02 Jupiter 1.63285579045176 1.63285543584971 1.63285614505352 1.64454663110553 1.29114672475454 2485037.905458059 1.82339872275504 76.9433462858892 62.3425743846646 -76.1734216907443 2167613.01444395 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42
2101-Oct-28 03:06 00:02 Jupiter 1.84555191636794 1.84555093516235 1.84555289757322 2.06187255775328 1.82576324853219 2488734.628988538 2.03409869262647 70.6822139718414 7.18061626523961 86.4716528286735 1816373.06972126 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42
2163-Sep-07 17:08 00:03 Jupiter 1.6978794249941 1.69787845684144 1.69788039314676 2.08970067396254 1.83551280282231 2511329.213737551 3.48571659531143 110.45841478659 17.1176613279024 -75.9787756333499 1475748.5975706 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42
2173-Oct-15 18:11 00:04 Jupiter 1.70115315852315 1.70115197905933 1.70115433798504 1.6653671405724 1.33327646408367 2515020.257307581 3.67728903535497 65.281617421547 55.4822624100477 64.2643225237122 1212567.28683449 T 27 CATAB v2.0f-lin.ifort 2020-Jun-23 15:41:55 2020-Jun-23 15:42

Alternate Designations
 1978 XD = 1955 UQ1 = 1972 YA = 1973 AK3 = 1977 VW = 1979 FS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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