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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1505525283171175 3.6209e-08  
a 3.132927921083119 1.6027e-08 au
q 2.661257701528764 1.1205e-07 au
i 1.178193890342969 4.6481e-06 deg
node 47.74774169546823 0.00020048 deg
peri 32.8808225340147 0.0002011 deg
M 163.9375575253079 1.726e-05 deg
tp 2457678.140996833028
(2016-Oct-16.64099683)
9.4401e-05 TDB
period 2025.461682804746
5.55
1.5542e-05
4.255e-08
d
yr
n .1777372551928468 1.3639e-09 deg/d
Q 3.604598140637473 1.844e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2183  
   data-arc span      23761 days (65.05 yr)  
   first obs. used      1954-07-31  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48605  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:22:41  

Additional Information
 Earth MOID = 1.67702 au 
 Jupiter MOID = 1.63723 au 
 T_jup = 3.195 
[ 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-January); 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 1.98258613209508 1.98258509927178 1.98258716491907 3.72610374028227 3.60962419388137 2425072.349981465 1.88866745348432 92.1796701926295 22.8851916069553 68.1722236410801 2362627.77296064 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22
1937-Aug-24 09:20 00:02 Jupiter 1.66849253655387 1.66849201827613 1.66849305483105 1.81445990004987 1.50895659628148 2428769.888741587 1.75445362835734 66.5921848602257 43.2986409124924 -75.3197405219758 1644183.08711938 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22
1947-Oct-07 02:07 00:01 Jupiter 1.78450958960504 1.78450891509519 1.78451026411448 1.8526822566226 1.57579373535965 2432465.588281496 1.46644555090189 63.9988783084831 21.7754250767316 -85.4042310882939 1931464.29777933 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22
2009-Aug-16 16:10 < 00:01 Jupiter 1.7552129722819 1.75521250850854 1.75521343605506 2.38917342468718 2.17784272886097 2455060.173414891 0.252069016484823 48.0663758090153 6.07280024384016 -89.7510298697545 2463299.83175767 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22
2019-Sep-24 16:17 < 00:01 Jupiter 1.66687470059504 1.66687432740907 1.66687507378062 1.58039265961506 1.21710344447115 2458751.178143887 0.301534259561959 70.4709560275665 59.7393190796831 69.9396238231477 2389730.62547781 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22
2081-Aug-05 04:09 00:02 Jupiter 1.90355340494493 1.90355263748445 1.90355417240584 3.27839914168143 3.13973926595845 2481346.672609942 1.58016696745164 77.9260026178815 19.2558341910716 76.7593212616204 2362640.49373104 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22
2091-Sep-13 09:44 00:02 Jupiter 1.63285588075685 1.63285552335226 1.63285623816115 1.64454694847408 1.29114715120963 2485037.905400365 1.86730628290202 78.8302764961504 63.123910159527 -76.4832294555326 2144715.40281869 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22
2101-Oct-28 03:06 00:02 Jupiter 1.84555207255732 1.84555106010169 1.84555308501263 2.06187341534866 1.82576423830651 2488734.628929877 2.08139912134332 71.8368836964301 7.35169550404133 86.5387357549135 1768870.49655997 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22
2163-Sep-07 17:08 00:04 Jupiter 1.6978794098964 1.69787841890397 1.69788040088882 2.08970059288581 1.83551270810103 2511329.213637641 3.56149490009529 113.116713253624 17.4317125352072 -76.0248434636586 1448681.19972959 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22
2173-Oct-15 18:10 00:04 Jupiter 1.70115334155024 1.70115213069381 1.70115455240465 1.66536790424591 1.33327745815117 2515020.257197390 3.75611800173341 66.2726718420304 56.7938701363809 60.4539129443981 1178859.91994379 T 24 CATAB v2.0f-lin.ifort 2019-Sep-23 19:22:51 2019-Sep-23 19:22

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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