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4151 Alanhale (1985 HV1)
Classification: Main-belt Asteroid          SPK-ID: 2004151
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1480192498694128 2.1614e-08  
a 3.139868426356177 1.3897e-08 au
q 2.675107457198282 7.0512e-08 au
i 1.00205016031749 9.463e-07 deg
node 66.87423449561614 0.00012774 deg
peri 76.21960401523052 0.00012689 deg
M 231.6010500302763 1.1015e-05 deg
tp 2460121.310661299373
(2023-Jun-25.81066130)
6.5092e-05 TDB
period 2032.196043108622
5.56
1.3492e-05
3.694e-08
d
yr
n .1771482634368843 1.1761e-09 deg/d
Q 3.604629395514072 1.5954e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2734  
   data-arc span      19472 days (53.31 yr)  
   first obs. used      1968-04-17  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46183  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:31:16  

Additional Information
 Earth MOID = 1.6886 au 
 Jupiter MOID = 1.4103 au 
 T_jup = 3.193 
[ 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 12.41   n/a E2021B10  
diameter diameter 19.526 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.918 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.045   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4151 Alanhale (1985 HV1)          Discovered 1985-Apr-24 by Shoemaker, C. and E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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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
1904-Oct-31 02:48 00:02 Jupiter 1.78541215076071 1.78541058226751 1.78541371925321 2.68204245286011 2.49890495404708 2416784.616558767 2.38460607332088 65.5418585046648 10.2494466360865 55.6638030272624 2491812.85530988 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
1915-Feb-20 14:33 00:02 Jupiter 1.43730866709196 1.43730833955592 1.4373089946409 1.15527758289527 0.395023182890383 2420549.106165751 2.10185079434374 2279.24664319202 297.152543578519 11.8449123141469 3509530.32102499 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
1925-Jun-22 13:47 00:02 Jupiter 1.67790751158262 1.67790639627583 1.67790862688769 1.72860422046164 1.40657559726891 2424324.074357043 1.85986767017204 75.483818446574 21.6451194253464 38.3058855748672 1970732.61647178 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
1999-Jan-31 18:03 < 00:01 Jupiter 1.55963218756577 1.55963186644066 1.55963250869062 1.677933695958 1.31502056815319 2451210.251813943 0.401993073637315 40.1772729587889 17.784740057447 26.4663940398585 3469723.79170214 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
2009-Jun-01 23:43 < 00:01 Jupiter 1.47038748708592 1.47038728619222 1.47038768798882 1.17395547018338 0.475461415882281 2454984.488428726 0.142052976210752 813.935478022777 197.12920014207 23.8822476127378 5977325.69343944 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
2019-Oct-02 16:51 < 00:01 Jupiter 1.91269378115869 1.91269361719331 1.91269394512408 2.57175986111931 2.39337906503722 2458759.202349924 0.159936548575659 20.080445949715 4.10839009763257 -89.4079996972425 7885190.85477085 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
2083-Jan-13 17:06 00:01 Jupiter 1.80345769393009 1.80345690856296 1.80345847929711 2.74827841310149 2.57171198102128 2481873.212713134 1.36886867760596 36.4773145032455 11.9004045803261 61.4629931103567 2558225.55237153 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
2093-May-04 11:39 00:02 Jupiter 1.4308706865318 1.43087041740704 1.43087095566697 1.15805143913339 0.396430480675503 2485636.985536667 1.6099298851444 1979.04809693289 254.511017572711 11.988663543667 4117512.43245451 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
2103-Sep-05 01:02 00:02 Jupiter 1.6512996909468 1.65129863055783 1.65130075133464 1.68780905223537 1.35011611555681 2489411.543244554 1.89110469020168 90.0283763673847 19.2706434194681 46.3693294989787 3223789.63676083 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
2177-Apr-18 12:28 00:03 Jupiter 1.57320213398968 1.5732005131956 1.57320375477812 1.73248887919628 1.38733715823153 2516301.019561153 3.44529251262116 142.644717355836 20.4665234839134 -8.70600713246279 780918.098305077 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
2187-Aug-16 17:00 00:04 Jupiter 1.44983688355933 1.44983585938884 1.44983790790956 1.14657232488999 0.382347671475492 2520073.208680043 3.60330033002504 4392.94077556475 317.316854125079 24.5849703335693 6472057.45375043 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32
2197-Dec-14 10:39 00:04 Jupiter 1.88773542809496 1.88773290285516 1.88773795333187 2.5338536476823 2.35011041092536 2523845.944047593 3.814377205492 65.7523776356111 16.1601198260806 14.0843274360612 728430.123384682 T 39 CATAB v2.0g-lin.ifort 2021-Aug-25 21:32:06 2021-Aug-25 21:32

Alternate Designations
 1985 HV1 = 1968 HD = 1976 SO1 = 1979 FX1 = 1982 SZ4 = 1985 JX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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