Asteroids

480808 1994XL1 help

Last update: 2024-05-03 19:05 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.318

Aphelion (Q)

1.024

Eccentricity (e)

0.526

Inclination (i)

28.2

deg

Orbit period (P)

200.7

Earth MOID

0.03676

U parameter

0.5

A₂

-45.9

10^-15au/days²

Next Earth close approach

Date

2027-12-11

Nominal distance (from Earth center)

0.13468

20147241

Maximum Brightness

19.3

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

20.6

mag

Diameter

210 - 500*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1994-12-06

Observatory

Siding Spring Observatory

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.670882

1-sigma variation

1.889E-9

Unit

Eccentricity (e)

Value

0.526231

1-sigma variation

4.536E-8

Unit

Inclination (i)

Value

28.1693

1-sigma variation

1.769E-5

Unit

Long. of Ascending Node (Ω)

Value

252.6461

1-sigma variation

3.429E-6

Unit

Arg. of Perihelion (ω)

Value

356.5739

1-sigma variation

1.338E-5

Unit

Mean Anomaly (M)

Value

320.71140

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.317843

1-sigma variation

Unit

Aphelion distance

Value

1.023922

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.696402

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.037136

1-sigma variation

Unit

MOID

Value

0.036762

1-sigma variation

Unit

Orbit Period

Value

200.7096

1-sigma variation

Unit

U parameter

Value

0.5

1-sigma variation

Unit

A₂

Value

-45.85456

1-sigma variation

1.58830

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	3.56819E-18	1.90524E-17	1.21307E-15	-2.99587E-16	3.91568E-15	-2.58405E-14	2.97538E-9
e	1.90524E-17	2.05708E-15	1.98420E-13	-2.19229E-14	-2.34279E-13	4.46954E-13	1.30697E-8
i	1.21307E-15	1.98420E-13	3.12787E-10	-5.58985E-12	-1.98307E-11	1.61068E-11	5.20166E-7
Ω	-2.99587E-16	-2.19229E-14	-5.58985E-12	1.17605E-11	-1.48066E-11	1.66827E-11	-1.09037E-7
ω	3.91568E-15	-2.34279E-13	-1.98307E-11	-1.48066E-11	1.78942E-10	-4.22945E-10	3.19048E-6
M	-2.58405E-14	4.46954E-13	1.61068E-11	1.66827E-11	-4.22945E-10	1.16626E-9	-2.06777E-5
A₂	2.97538E-9	1.30697E-8	5.20166E-7	-1.09037E-7	3.19048E-6	-2.06777E-5	2.52269E0

Date of computation: 2024-04-23 10:08 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.562

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

210 - 500*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

10597

Unit

Source

[1]

Unobserved

Value

145

Unit

Source

[1]

Normalized RMS of residuals

Value

0.517367

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1994-12-06.58147

Unit

Source

[2]

Last Observation

Value

2023-12-11.122685

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

314 (12)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close approaches for 480808 1994XL1 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1950-11-27 05:22	6.1	0.1369220	0.1366325	0.0000965
EARTH	1955-12-09 05:35	5.9	0.0727404	0.0724929	0.0000826
EARTH	1961-11-29 01:22	6.2	0.1001562	0.0999481	0.0000694
EARTH	1966-12-10 13:50	2.8	0.1128445	0.1126345	0.0000700
EARTH	1972-12-01 07:25	4.8	0.0658955	0.0657721	0.0000412
EARTH	1977-12-11 05:25	< 1 min	0.1559409	0.1558008	0.0000467
EARTH	1983-12-04 11:10	2.6	0.0414208	0.0413828	0.0000127
EARTH	1988-12-11 05:49	< 1 s	0.1966481	0.1965785	0.0000232
EARTH	1989-11-25 07:33	< 1 min	0.1888303	0.1887742	0.0000187
EARTH	1994-12-06 05:13	< 1 min	0.0370942	0.0370858	0.0000028
EARTH	2000-11-26 03:52	< 1 min	0.1545962	0.1545794	0.0000056
EARTH	2005-12-07 23:10	< 1 min	0.0564504	0.0564442	0.0000021
EARTH	2011-11-28 15:45	< 1 min	0.1182467	0.1182455	0.0000004
EARTH	2016-12-09 13:49	< 1 s	0.0921941	0.0921940	0.0000001
EARTH	2022-11-30 18:09	< 1 min	0.0819502	0.0819478	0.0000008
EARTH	2027-12-11 14:28	< 1 min	0.1346760	0.1346661	0.0000033
EARTH	2033-12-03 00:33	< 1 min	0.0515106	0.0514962	0.0000048
EARTH	2038-12-11 22:08	< 1 min	0.1769066	0.1768660	0.0000135
EARTH	2044-12-04 23:17	1.7	0.0363676	0.0363596	0.0000027
EARTH	2050-11-26 07:26	1.3	0.1716902	0.1715967	0.0000312
EARTH	2055-12-07 16:24	3.4	0.0443496	0.0442797	0.0000233
EARTH	2061-11-27 10:44	3.5	0.1364207	0.1362538	0.0000557
EARTH	2066-12-09 10:21	4.7	0.0732767	0.0730831	0.0000646
EARTH	2072-11-29 06:21	7.0	0.0994526	0.0992183	0.0000781
EARTH	2077-12-10 19:12	4.2	0.1132594	0.1129456	0.0001046
EARTH	2083-12-02 12:02	10.4	0.0652613	0.0649947	0.0000890
EARTH	2088-12-11 11:28	2.3	0.1561907	0.1557701	0.0001402
EARTH	2094-12-04 15:28	12.4	0.0411733	0.0409903	0.0000616
EARTH	2099-12-12 12:29	< 1 min	0.1967016	0.1961548	0.0001823
EARTH	2100-11-26 13:30	4.9	0.1888326	0.1883398	0.0001644
EARTH	2105-12-07 09:29	15.2	0.0373662	0.0372380	0.0000440
EARTH	2111-11-28 09:20	11.3	0.1543753	0.1536996	0.0002254
EARTH	2116-12-09 03:44	20.1	0.0569560	0.0563384	0.0002070
EARTH	2122-11-29 20:42	21.9	0.1177583	0.1168889	0.0002903

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