ǂKá̦gára and ǃHãunu (469705 2005 EF298)

System parameters

Heliocentric orbitPhotometry Position 2022/03/21 22:19 UTC
DES class = CLASSICAL HV = 6.5±0.5 +11:42:16.41 +04:34:55.4
<a> = 44.08 (AU) V = 22.5 (V2 = 23.6) Uncertainty = 0.1 (arcsec)
<e> = 0.085 Δmag = 0.59 Rates: -2.902, +1.247 ("/hr)
<i> = 1.60 (degrees) B-V = NULL  
Perihelion = 2036 V-R = NULL Opposition: March
Aphelion = 2181    

Additional links

How to say the names ǂKá̦gára and ǃHãunu

Astrometric observations

Observation time (UTC)Observatory/InstrumentRADEC Δ (AU)Δx (arcsec) Δx errorΔy (arcsec) Δy error
2009/01/21  11.60611 HST/WFPC2-PC +10:33:44.91 +10:57:25.9 40.00541 +0.09786 0.00156 -0.05787 0.00120
2011/03/20  02.43236 HST/WFC3-UVIS +10:40:45.54 +10:24:18.0 39.77596 +0.04118 0.00396 -0.05227 0.00232
2011/03/27  19.67467 HST/WFC3-UVIS +10:40:12.88 +10:27:27.0 39.82903 -0.00254 0.01000 -0.01572 0.01000
2011/04/18  07.24028 GEMINI/NIRI +10:38:58.73 +10:34:18.3 40.05491 -0.16958 0.05000 +0.05023 0.05000
2011/04/22  12.14569 HST/WFC3-UVIS +10:38:47.88 +10:35:14.9 40.11044 -0.14760 0.00208 +0.05441 0.00090
2011/05/10  17.37921 HST/WFC3-UVIS +10:38:17.47 +10:37:36.1 40.38186 -0.22359 0.00409 +0.09162 0.00204
2011/07/08  20.53215 HST/WFC3-UVIS +10:40:00.51 +10:25:12.1 41.31577 +0.10157 0.00423 -0.06248 0.00371
2012/02/03  14.70128 GEMINI/NIRI +10:49:47.69 +09:32:59.9 39.77523 -0.23913 0.00300 +0.11707 0.01041
2012/03/18  11.48416 HST/WFC3-UVIS +10:46:27.54 +09:53:46.8 39.71261 +0.09076 0.00217 -0.05348 0.00135
2013/03/21  11.32227 KECK2/NIRC2 +10:51:53.37 +09:24:25.2 39.67090 -0.18031 0.00447 +0.11321 0.00340

Orbital knowledge

Comments: Orbit published here.
Parameter Value Units
P period128.11±0.03days
a semimajor axis7700±100kilometers
e eccentricity0.69±0.01dimensionless
i inclination33.3±0.4degrees
ε mean longitude at epoch136.1±0.9degrees
Ω longitude of ascending node4.1±0.3degrees
ϖ longitude of periapsis183.6±0.8degrees

Angles are referenced to J2000 equatorial coordinates.

Epoch = Julian date 2455600.0

2022/03/21 22:19


Last updated: 2022/03/21 22:19 UTC