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JPL Small-Body Database Browser
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523815 (2009 HW44)
Classification: Amor [NEO]          SPK-ID: 2523815
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 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5923361029108569 1.5869e-07  
a 2.687129991529267 1.3124e-07 au
q 1.095445884331937 3.7953e-07 au
i 41.08139437557967 2.7649e-05 deg
node 37.86068761370219 8.2867e-06 deg
peri 296.5698705482359 4.1444e-05 deg
M 141.8873642830628 8.6029e-06 deg
tp 2458366.378232202340
(2018-Sep-04.87823220)
3.859e-05 TDB
period 1608.908852177529
4.40
0.00011787
3.227e-07
d
yr
n .2237541297089445 1.6393e-08 deg/d
Q 4.278814098726596 2.0898e-07 au
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      3544 days (9.70 yr)  
   first obs. used      2009-04-22  
   last obs. used      2019-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .31988  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:22:25  

Additional Information
 Earth MOID = .318524 au 
 Jupiter MOID = 2.42149 au 
 T_jup = 2.809 
[ 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 17.5   n/a MPO159141  
rotation period rot_per 6.85 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 144-152.]

523815 (2009 HW44)          Discovered 2009-Apr-22 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2018-10-30

[ 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
1908-Oct-22 05:39 00:06 Earth 0.299146857242642 0.299146001004006 0.299147760271368 23.7011165740903 23.7007407690947 2418236.735670430 5.62262277716955 11115.0728679842 37.1218765033361 -89.8808531587823 1168169.11622987 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
1930-Oct-23 02:41 00:04 Earth 0.301619275066068 0.301609688682673 0.301628945420688 23.9870346811996 23.9866663995872 2426272.611678316 4.18039841398469 7974.64427080224 37.382025319672 86.5589989520452 1159751.17409608 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
1952-Oct-23 09:03 00:03 Earth 0.317021806116362 0.316999497852747 0.317044152275937 24.6335245241747 24.6331833315192 2434308.876999837 3.0986282839495 5581.22164965188 38.754132916492 78.5001958623345 1145709.5061627 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
1974-Oct-23 15:19 00:02 Earth 0.310606290372297 0.310593238660065 0.310619357810572 24.6329610210077 24.6326127730644 2442344.137940184 1.99605040803722 3551.7759309726 39.4321276187088 79.4540622461853 1107522.46919503 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
1996-Oct-22 19:50 < 00:01 Earth 0.32010249580721 0.320096131273073 0.320108863902759 24.5282949053635 24.5279555466993 2450379.326136431 0.95105243077008 1725.88504874115 38.8360830144374 79.4786069377492 1154699.75238535 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
2018-Oct-23 02:35 < 00:01 Earth 0.32821435621056 0.328213611973059 0.328215100448808 24.6066958301347 24.6063659133629 2458414.607769663 0.0705586650175319 48.2928964130906 22.5846539378833 -46.3787205728687 1780172.54066913 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
2040-Oct-24 06:31 < 00:01 Earth 0.350832462114083 0.350820474374612 0.350844452721307 25.6525145316797 25.6522184679886 2466451.771766094 0.991674815226491 1694.50183752931 41.4563766274283 69.3859827042843 1118611.63835596 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
2058-Jun-26 11:42 00:04 Mars 0.0614852443988026 0.0614769739822908 0.0614935420943569 20.9386035660657 20.9383811890617 2472905.987236034 3.984635628389 2093.54920264591 41.034010205458 -78.6747604469202 219838.144374159 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
2062-Oct-24 15:27 00:02 Earth 0.360359808077382 0.360333658986661 0.36038596905942 25.7203450049801 25.7200575289446 2474487.143556003 2.04485699773687 3516.76920379219 41.8521157108183 68.2414401395573 1128644.97422479 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
2084-Oct-25 23:50 00:04 Earth 0.405277851080479 0.405220786464809 0.405334938505135 26.9201215650556 26.9198773432486 2482524.493127285 3.59024672899722 5576.07525103296 44.5929641886113 59.311406918037 1099601.26145337 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
2106-Oct-29 05:19 00:05 Earth 0.465032860972173 0.464938529765408 0.46512722392336 28.2082860093358 28.2080828889189 2490561.721423041 5.33042741940296 7671.12718988314 47.7554961601369 52.1731380584173 1081935.84616493 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
2128-Oct-30 00:20 00:07 Earth 0.493141036019312 0.493015468090028 0.493266644637683 29.0767673022101 29.0765814804881 2498598.513756128 6.96384524569126 9440.25988764785 50.4737769680743 48.4422077743369 1031125.10759368 T 47 CATAB v2.0f-lin.ifort 2019-Dec-21 06:22:40 2019-Dec-21 06:22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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