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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1480192495296068 2.1644e-08  
a 3.139868426179938 1.3937e-08 au
q 2.675107458115076 7.0565e-08 au
i 1.002050187581972 9.4819e-07 deg
node 66.87423816144634 0.00012798 deg
peri 76.21960033665388 0.00012714 deg
M 231.6010501093407 1.1031e-05 deg
tp 2460121.310660792031
(2023-Jun-25.81066079)
6.5196e-05 TDB
period 2032.196042937523
5.56
1.3531e-05
3.705e-08
d
yr
n .1771482634517992 1.1795e-09 deg/d
Q 3.6046293942448 1.6e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2695  
   data-arc span      19420 days (53.17 yr)  
   first obs. used      1968-04-17  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:33:32  

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

[ 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
1904-Oct-31 02:48 00:02 Jupiter 1.78541215863755 1.78541058590737 1.78541373136701 2.68204252939755 2.4989050370313 2416784.616570820 2.39110982090897 65.7347760474512 10.2637617006042 55.6777983818956 2489139.67019368 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
1915-Feb-20 14:33 00:02 Jupiter 1.43730866929105 1.43730834028961 1.43730899830555 1.15527759201732 0.395023211851093 2420549.106173147 2.10768687176985 2288.78845742472 297.652590235949 11.8647145213171 3505313.65534054 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
1925-Jun-22 13:47 00:02 Jupiter 1.67790750823888 1.67790639048022 1.67790862599593 1.72860413949962 1.40657549705584 2424324.074371740 1.86502851224484 75.5944152567043 21.6710263372807 38.3041078169092 1966827.94238005 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
1999-Jan-31 18:03 < 00:01 Jupiter 1.55963218851226 1.55963186639466 1.5596325106296 1.67793373188156 1.3150206142414 2451210.251818582 0.402981203527731 40.3071521342356 17.7904497276219 26.4349712542592 3462128.70204351 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
2009-Jun-01 23:43 < 00:01 Jupiter 1.47038748821671 1.4703872870191 1.47038768942359 1.17395543759349 0.475461336346755 2454984.488440650 0.142247336407934 814.787000207525 197.452752358664 23.902534974536 5971812.84382977 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
2019-Oct-02 16:51 < 00:01 Jupiter 1.91269378189889 1.91269361778738 1.9126939460103 2.57175981930203 2.39337902017487 2458759.202353841 0.160223116223051 20.1151399074522 4.11024214037243 -89.397120427197 7880769.85783464 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
2083-Jan-13 17:06 00:01 Jupiter 1.8034576898181 1.80345690221134 1.80345847742466 2.74827840094437 2.57171196761308 2481873.212708985 1.37289081111505 36.5528363395117 11.9328654284341 61.4183682028903 2552385.05368919 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
2093-May-04 11:39 00:02 Jupiter 1.43087068659713 1.43087041745732 1.43087095574726 1.15805143627456 0.396430472392473 2485636.985531192 1.6144863699128 1979.27103602135 255.255525353853 11.9831772511956 4107309.43865647 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
2103-Sep-05 01:02 00:02 Jupiter 1.65129969645844 1.65129863247911 1.65130076043665 1.68780906986576 1.35011613886504 2489411.543238706 1.89645741064933 90.3822163509214 19.2859090420469 46.3566600426098 3220259.54495462 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
2177-Apr-18 12:28 00:03 Jupiter 1.5732021277701 1.57320050285714 1.57320375267737 1.7324887916013 1.38733704730975 2516301.019544207 3.45507550779596 142.974627371146 20.4819947128814 -8.72716081830397 780512.021949485 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
2187-Aug-16 17:00 00:04 Jupiter 1.44983688802718 1.4498358600636 1.44983791617207 1.14657234435135 0.382347734544274 2520073.208667330 3.61351871020587 4411.09558483611 317.617747378334 24.5882127713394 6465323.03638595 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34
2197-Dec-14 10:39 00:04 Jupiter 1.88773543718927 1.88773290466482 1.88773796971083 2.53385373069506 2.35011050134828 2523845.944033916 3.8250650205886 65.9263171175466 16.1867092687047 14.0565474515523 725935.163320759 T 37 CATAB v2.0g-lin.ifort 2021-Jul-09 13:34:32 2021-Jul-09 13:34

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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