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469421 (2001 XD255)

Classification: TransNeptunian Object SPK-ID: 2469421

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.1104697498202652	1.3556e-05
a	39.20150902493665	0.0012327	au
q	34.87092813037503	0.001171	au
i	18.14691601631295	9.7097e-05	deg
node	106.7474272419121	9.6273e-05	deg
peri	112.8372097160204	0.012291	deg
M	285.1950680081829	0.012131	deg
t_p	2477629.105091952624 (2071-Jun-01.60509195)	2.1475	TDB
period	89650.47697438649 245.45	4.2286 0.01158	d yr
n	.004015594920960136	1.8941e-07	deg/d
Q	43.53208991949827	0.0013689	au

Orbit Determination Parameters

# obs. used (total)	134
data-arc span	6623 days (18.13 yr)
first obs. used	2001-12-09
last obs. used	2020-01-27
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	2
norm. resid. RMS	.5398
source	ORB
producer	Otto Matic
solution date	2020-Feb-26 13:57:39

Additional Information

Earth MOID = 33.9063 au

Jupiter MOID = 29.6723 au

T_jup = 5.317

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Orbital Elements at Epoch 2456860.5 (2014-Jul-22.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.1104553704110234	1.3876e-05
q	35.25283053571367	0.0011155	au
t_p	2476582.344188924846 (2068-Jul-19.84418892)	2.2131	TDB
node	106.6469910900591	9.6561e-05	deg
peri	107.3907217349606	0.012306	deg
i	18.06465440063932	9.6559e-05	deg

Orbit Determination Parameters

# obs. used (total)	134
data-arc span	6623 days (18.13 yr)
first obs. used	2001-12-09
last obs. used	2020-01-27
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	2
norm. resid. RMS	.5398
source	ORB
producer	Otto Matic
solution date	2020-Feb-26 13:57:39

Additional Information

Jupiter MOID = 29.6723 au

T_jup = 5.317

Orbit Covariance (6×6)

	e	q	tp	node	peri	i
e	1.925550044587674E-10	-3.588956236850843E-9	-9.052828879113943E-6	-3.080924972491562E-11	-2.766504684112211E-8	-2.079895145591928E-11
q	-3.588956236850843E-9	1.244279665035515E-6	-.002122832234845278	-2.144359834523948E-9	-1.265163548875181E-5	1.99765098741232E-9
tp	-9.052828879113943E-6	-.002122832234845278	4.898009991193927	6.704205452915823E-6	.02697769593739101	-2.1400916026242E-6
node	-3.080924972491562E-11	-2.144359834523948E-9	6.704205452915823E-6	9.324046591498954E-9	2.583350398768513E-8	9.080386752965597E-9
peri	-2.766504684112211E-8	-1.265163548875181E-5	.02697769593739101	2.583350398768513E-8	.0001514375073916532	-2.358750177905127E-8
i	-2.079895145591928E-11	1.99765098741232E-9	-2.1400916026242E-6	9.080386752965597E-9	-2.358750177905127E-8	9.323621761773735E-9

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table

Parameter	Symbol	Value	Units	Sigma	Reference	Notes
absolute magnitude	H	5.6		n/a	MPO382875

469421 (2001 XD255) Discovered 2001-Dec-09 by Sheppard, S. S., Jewitt, D. C., Kleyna, J. at Mauna Kea
Reference:	Last Updated: 2016-08-22

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

2020-Oct-23 08:29 UT
(server date/time)

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