Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
180684 (2004 HW1)
Classification: Main-belt Asteroid          SPK-ID: 2180684
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1028139986904002 5.5146e-08  
a 2.755487469917699 2.4289e-08 au
q 2.472184784794166 1.6416e-07 au
i 13.76369970448297 5.6776e-06 deg
node 41.19940448882244 1.8097e-05 deg
peri 121.5909743435388 3.1226e-05 deg
M 275.1753080028108 2.6688e-05 deg
tp 2459594.155096278371
(2022-Jan-14.65509628)
0.00012599 TDB
period 1670.690825083212
4.57
2.209e-05
6.048e-08
d
yr
n .2154797252699759 2.8491e-09 deg/d
Q 3.038790155041232 2.6786e-08 au
  Orbit Determination Parameters
   # obs. used (total)      400  
   data-arc span      8022 days (21.96 yr)  
   first obs. used      1999-02-23  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55243  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:27:31  

Additional Information
 Earth MOID = 1.50594 au 
 Jupiter MOID = 1.99123 au 
 T_jup = 3.294 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457553.5 (2016-Jun-14.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1016406522580349 5.5684e-08  
q 2.475415076375365 1.6552e-07 au
tp 2457926.975922904612
(2017-Jun-22.47592290)
0.00011902 TDB
node 41.21749148048301 1.8085e-05 deg
peri 122.3584478135773 3.1284e-05 deg
i 13.76852572980506 5.6794e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      400  
   data-arc span      8022 days (21.96 yr)  
   first obs. used      1999-02-23  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55243  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:27:31  

Additional Information
 Jupiter MOID = 1.99123 au 
 T_jup = 3.294 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.100754404271607E-15 -9.157047870803816E-15 6.484750094264379E-13 -7.279056872266378E-15 2.820941926099462E-13 3.237051459576733E-16
q -9.157047870803816E-15 2.739680393714978E-14 -1.097346938975481E-12 1.771117323373288E-14 -6.808823001951055E-13 8.15779946764963E-16
tp 6.484750094264379E-13 -1.097346938975481E-12 1.416601076449285E-8 -3.73782704861829E-11 3.036167197713869E-9 1.098847303481154E-11
node -7.279056872266378E-15 1.771117323373288E-14 -3.73782704861829E-11 3.270700843610507E-10 -3.25430488574393E-10 -1.066464133824741E-11
peri 2.820941926099462E-13 -6.808823001951055E-13 3.036167197713869E-9 -3.25430488574393E-10 9.787128961212326E-10 1.261235668867147E-11
i 3.237051459576733E-16 8.15779946764963E-16 1.098847303481154E-11 -1.066464133824741E-11 1.261235668867147E-11 3.225564972204461E-11

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 15.91   n/a MPCxxxxx  

180684 (2004 HW1)          Discovered 2004-Apr-20 by Yeung, W. K. Y. at Desert Eagle
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-16 01:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin