Asteroids

2020XY4 help

Last update: 2024-04-16 13:38 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.561

Aphelion (Q)

1.164

Eccentricity (e)

0.350

Inclination (i)

1.1

deg

Orbit period (P)

292.5

Earth MOID

0.00261

U parameter

6.0

Next Earth close approach

Date

2024-12-20

Nominal distance (from Earth center)

0.03249

4861174

Maximum Brightness

21.6

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 24*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-12-11

Observatory

Pan-STARRS 2, Haleakala

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

0.862383

1-sigma variation

0.000019

Unit

Eccentricity (e)

Value

0.349809

1-sigma variation

0.000099

Unit

Inclination (i)

Value

1.1188

1-sigma variation

0.0005

Unit

Long. of Ascending Node (Ω)

Value

261.3912

1-sigma variation

0.0031

Unit

Arg. of Perihelion (ω)

Value

319.1711

1-sigma variation

0.0005

Unit

Mean Anomaly (M)

Value

295.89419

1-sigma variation

0.05373

Unit

Perihelion distance

Value

0.560714

1-sigma variation

Unit

Aphelion distance

Value

1.164053

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.416726

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.044424

1-sigma variation

Unit

MOID

Value

0.002609

1-sigma variation

Unit

Orbit Period

Value

292.5156

1-sigma variation

Unit

U parameter

Value

6.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.54810E-10	-1.86511E-9	-9.94023E-9	-5.79926E-8	9.66505E-9	-1.01207E-6
e	-1.86511E-9	9.80517E-9	5.22561E-8	3.04858E-7	-5.08283E-8	5.32021E-6
i	-9.94023E-9	5.22561E-8	2.78553E-7	1.62505E-6	-2.71165E-7	2.83543E-5
Ω	-5.79926E-8	3.04858E-7	1.62505E-6	9.48068E-6	-1.58183E-6	1.65421E-4
ω	9.66505E-9	-5.08283E-8	-2.71165E-7	-1.58183E-6	2.65634E-7	-2.75719E-5
M	-1.01207E-6	5.32021E-6	2.83543E-5	1.65421E-4	-2.75719E-5	2.88687E-3

Date of computation: 2024-02-21 14:29 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

26.932

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

11 - 24*

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

[-]

Download this part as:

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

Unit

Source

[1]

Unobserved

Value

1212

Unit

Source

[1]

Normalized RMS of residuals

Value

0.659201

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-12-11.572541

Unit

Source

[2]

Last Observation

Value

2020-12-21.079799

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

76 (4)

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 2020XY4 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	1950-09-25 18:02	> 1 d	0.0741023	0.0226111	0.0441873
EARTH	1954-11-11 18:50	> 1 w	0.1639378	0.1564227	0.0025220
EARTH	1958-12-21 01:13	123.7	0.0101872	0.0016624	0.0030575
EARTH	1962-12-18 21:38	143.5	0.1595910	0.1487116	0.0036265
EARTH	1969-09-20 11:53	103.1	0.0924147	0.0814736	0.0036622
EARTH	1973-09-24 18:10	481.2	0.0745863	0.0675527	0.0023561
VENUS	1974-05-17 22:10	257.6	0.0490483	0.0450730	0.0015951
EARTH	1977-10-24 13:13	696.1	0.1618972	0.1605907	0.0004357
EARTH	1981-11-22 15:32	190.4	0.1523876	0.1522174	0.0000567
EARTH	1985-12-18 21:52	72.6	0.0487388	0.0464086	0.0007768
EARTH	1989-12-20 10:47	64.0	0.0952135	0.0901333	0.0016935
VENUS	1993-06-12 05:02	212.4	0.0466653	0.0441380	0.0009963
EARTH	1996-09-22 14:36	107.5	0.1803254	0.1731196	0.0024026
EARTH	2000-09-19 12:09	24.9	0.0417119	0.0344664	0.0025151
EARTH	2004-09-24 20:23	420.5	0.0788253	0.0731995	0.0018816
EARTH	2008-10-18 06:03	576.2	0.1536919	0.1524276	0.0004215
EARTH	2012-11-11 23:49	415.9	0.1663708	0.1657754	0.0001985
EARTH	2016-12-06 18:30	170.4	0.1165919	0.1154594	0.0003775
EARTH	2020-12-20 22:26	< 1 s	0.0052857	0.0052808	0.0000016
EARTH	2024-12-20 00:08	52.5	0.0324949	0.0303835	0.0007040
EARTH	2028-12-15 04:49	177.8	0.0803177	0.0781972	0.0007068
EARTH	2032-12-05 05:02	289.0	0.1233172	0.1219573	0.0004533
EARTH	2036-11-23 04:55	298.0	0.1543802	0.1538227	0.0001859
EARTH	2040-11-10 07:21	227.7	0.1714857	0.1714205	0.0000217
EARTH	2044-10-29 22:29	124.6	0.1723484	0.1720069	0.0001138
EARTH	2048-10-18 12:08	13.6	0.1602662	0.1599790	0.0000958
EARTH	2052-10-06 11:05	85.0	0.1343172	0.1341780	0.0000464
EARTH	2056-09-25 00:10	109.0	0.0925574	0.0916451	0.0003042
EARTH	2060-09-18 22:39	51.5	0.0413285	0.0398871	0.0004832
EARTH	2064-09-17 15:50	15.1	0.0196672	0.0194277	0.0001040
EARTH	2068-09-17 18:59	30.5	0.0632931	0.0574569	0.0019553
EARTH	2072-09-19 09:37	119.2	0.1336729	0.1235384	0.0033810
VENUS	2073-05-31 09:38	442.8	0.0412176	0.0411326	0.0002878
EARTH	2085-12-19 12:16	454.4	0.1370248	0.1028220	0.0114032
EARTH	2089-12-21 07:40	232.2	0.0555160	0.0205050	0.0117399
EARTH	2093-12-21 05:50	222.4	0.0112157	0.0047463	0.0058910
EARTH	2097-12-03 17:24	> 1 w	0.1303764	0.0746586	0.0185953
EARTH	2101-11-08 22:58	> 1 w	0.1745333	0.1579961	0.0055667
EARTH	2105-10-12 18:13	> 1 w	0.1492669	0.0365318	0.0392700
EARTH	2109-09-20 07:16	> 1 w	0.0487068	0.0177572	0.1091656
EARTH	2113-09-19 01:11	> 1 d	0.0828923	0.0185191	0.1259609
EARTH	2122-12-21 02:05	> 1 d	0.1291049	0.0060751	0.1047760

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