Asteroids

2019GK21 help

Last update: 2024-04-23 14:44 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.567

Aphelion (Q)

1.154

Eccentricity (e)

0.341

Inclination (i)

5.9

deg

Orbit period (P)

291.6

Earth MOID

0.00278

U parameter

0.6

Next Earth close approach

Date

2027-04-18

Nominal distance (from Earth center)

0.08149

12191198

Maximum Brightness

22.1

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

25.6

mag

Diameter

20 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2019-04-14

Observatory

Catalina Sky Survey

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

0.860649

1-sigma variation

3.452E-9

Unit

Eccentricity (e)

Value

0.340624

1-sigma variation

0.000001

Unit

Inclination (i)

Value

5.9205

1-sigma variation

1.581E-5

Unit

Long. of Ascending Node (Ω)

Value

19.4714

1-sigma variation

1.450E-5

Unit

Arg. of Perihelion (ω)

Value

46.6240

1-sigma variation

1.435E-5

Unit

Mean Anomaly (M)

Value

182.70667

1-sigma variation

0.00008

Unit

Perihelion distance

Value

0.567491

1-sigma variation

Unit

Aphelion distance

Value

1.153808

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.380536

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.008603

1-sigma variation

Unit

MOID

Value

0.002779

1-sigma variation

Unit

Orbit Period

Value

291.6338

1-sigma variation

Unit

U parameter

Value

0.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.19194E-17	-1.68866E-15	-5.18654E-14	-3.13595E-14	-3.26874E-14	2.66754E-13
e	-1.68866E-15	2.51935E-13	7.19783E-12	3.26732E-12	5.70884E-12	-3.86748E-11
i	-5.18654E-14	7.19783E-12	2.50096E-10	1.53100E-10	1.13564E-10	-1.12335E-9
Ω	-3.13595E-14	3.26732E-12	1.53100E-10	2.10277E-10	-3.00808E-11	-6.25121E-10
ω	-3.26874E-14	5.70884E-12	1.13564E-10	-3.00808E-11	2.05936E-10	-8.23338E-10
M	2.66754E-13	-3.86748E-11	-1.12335E-9	-6.25121E-10	-8.23338E-10	6.07717E-9

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

25.601

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

20 - 50*

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

1475

Unit

Source

[1]

Unobserved

Value

362

Unit

Source

[1]

Normalized RMS of residuals

Value

0.615146

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2019-04-14.15324

Unit

Source

[2]

Last Observation

Value

2023-04-28.144314

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

83 (2)

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 2019GK21 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	1953-04-10 05:20	55.7	0.0013335	0.0013268	0.0001832
EARTH	1957-04-13 17:51	339.3	0.0568080	0.0505319	0.0020923
EARTH	1961-04-24 05:48	549.9	0.1096352	0.1061615	0.0011584
EARTH	1965-05-07 17:14	281.8	0.1433194	0.1424094	0.0003034
VENUS	1968-11-25 03:06	22.3	0.0114780	0.0107380	0.0002494
EARTH	1969-05-24 14:50	100.8	0.1598640	0.1598039	0.0000201
EARTH	1973-06-26 15:13	66.1	0.1381868	0.1379589	0.0000761
EARTH	1977-07-10 16:60	1.5	0.1162229	0.1160635	0.0000535
VENUS	1985-10-18 09:13	5.2	0.0382177	0.0380130	0.0000683
EARTH	1992-04-10 10:09	2.6	0.0782116	0.0780359	0.0000586
EARTH	1996-04-11 11:01	8.6	0.0270468	0.0266847	0.0001207
VENUS	1999-04-29 04:59	5.9	0.0293889	0.0292652	0.0000414
EARTH	2000-05-03 21:13	9.2	0.1336980	0.1336548	0.0000144
VENUS	2001-07-04 10:59	< 1 min	0.0057097	0.0057052	0.0000015
EARTH	2004-06-17 08:33	1.4	0.1496708	0.1496672	0.0000012
EARTH	2008-07-09 22:56	< 1 min	0.1336201	0.1336151	0.0000016
EARTH	2019-04-11 09:49	< 1 s	0.0030476	0.0030476	0.0000000
EARTH	2023-04-13 04:57	< 1 s	0.0390207	0.0390205	0.0000001
VENUS	2023-12-10 06:59	< 1 min	0.0466228	0.0466221	0.0000003
EARTH	2027-04-18 10:44	< 1 s	0.0814931	0.0814925	0.0000002
EARTH	2031-04-28 02:08	< 1 s	0.1179789	0.1179779	0.0000003
VENUS	2034-02-12 04:57	< 1 min	0.0151282	0.0151242	0.0000013
EARTH	2035-05-07 13:19	< 1 min	0.1422561	0.1422534	0.0000009
EARTH	2039-05-11 01:20	2.8	0.1484496	0.1484422	0.0000025
VENUS	2042-02-09 13:54	< 1 min	0.0114044	0.0113723	0.0000107
EARTH	2043-05-21 05:08	6.5	0.1576660	0.1576650	0.0000003
EARTH	2047-06-12 12:19	36.1	0.1563018	0.1562461	0.0000186
EARTH	2051-07-05 13:28	31.5	0.1218614	0.1216737	0.0000627
VENUS	2053-06-17 20:06	18.7	0.0247838	0.0243348	0.0001515
EARTH	2055-07-12 03:14	2.6	0.1122746	0.1120162	0.0000868
VENUS	2055-08-26 01:59	33.1	0.0247993	0.0238411	0.0003194
EARTH	2059-07-10 07:28	< 1 s	0.1701701	0.1701029	0.0000224
VENUS	2067-01-01 17:45	40.8	0.0379460	0.0362609	0.0005656
EARTH	2074-04-13 16:39	14.2	0.1740197	0.1728042	0.0004052
EARTH	2078-04-11 14:51	5.7	0.0980349	0.0972817	0.0002511
EARTH	2082-04-10 19:23	1.5	0.0239022	0.0238786	0.0000079
EARTH	2086-04-11 02:25	5.8	0.0039434	0.0039048	0.0000330
EARTH	2090-04-10 19:41	114.5	0.0208167	0.0038012	0.0158646
EARTH	2094-04-11 17:44	307.1	0.0976399	0.0690977	0.0095156
EARTH	2098-04-14 02:37	> 1 d	0.1773632	0.0762914	0.0336939
VENUS	2098-12-24 21:42	> 1 d	0.0396782	0.0146909	0.0441140
EARTH	2115-07-12 08:11	872.2	0.1898319	0.1404484	0.0176595
EARTH	2119-07-13 18:38	75.2	0.1503935	0.1472520	0.0010626
EARTH	2123-07-14 18:18	599.5	0.1210052	0.0996139	0.0141208

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2019GK21

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2118-04-10.130	94742.130	1.785	0.000	0.64 ± 0.027	2.71E5	9.41E-7	5.44E-7	-6.67	0


Based on 83 optical observations (of which 2 are rejected as outliers) from 2019/04/14.153 to 2023/04/28.144.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.57 and 1.57 Earth radii.
Coordinates for LOV = KEP scaled= 2 second= F.
Aegis software version= 4.0, Date of computation=20240110 090432.945 UTC.

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Download Impactor Table as: