Asteroids

2019EM1 help

Last update: 2024-04-25 12:45 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.301

Aphelion (Q)

1.040

Eccentricity (e)

0.551

Inclination (i)

28.5

deg

Orbit period (P)

200.7

Earth MOID

0.00111

U parameter

1.7

Next Earth close approach

Date

2030-03-01

Nominal distance (from Earth center)

0.02842

4251387

Maximum Brightness

16.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

22.2

mag

Diameter

100 - 210*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2019-03-04

Observatory

ATLAS-MLO, Mauna Loa

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

0.670858

1-sigma variation

1.625E-8

Unit

Eccentricity (e)

Value

0.550902

1-sigma variation

2.830E-7

Unit

Inclination (i)

Value

28.4535

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

159.6943

1-sigma variation

1.510E-5

Unit

Arg. of Perihelion (ω)

Value

196.7306

1-sigma variation

2.202E-5

Unit

Mean Anomaly (M)

Value

222.17702

1-sigma variation

0.00008

Unit

Perihelion distance

Value

0.301281

1-sigma variation

Unit

Aphelion distance

Value

1.040435

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.001342

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.702627

1-sigma variation

Unit

MOID

Value

0.001112

1-sigma variation

Unit

Orbit Period

Value

200.6987

1-sigma variation

Unit

U parameter

Value

1.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.64108E-16	-3.89743E-15	-7.37619E-13	9.41361E-14	-2.52304E-13	-1.05437E-12
e	-3.89743E-15	8.00803E-14	1.33425E-11	-1.53689E-12	5.90053E-12	7.95698E-12
i	-7.37619E-13	1.33425E-11	3.47934E-9	-7.04989E-11	7.97417E-10	2.06287E-9
Ω	9.41361E-14	-1.53689E-12	-7.04989E-11	2.28008E-10	-1.32452E-10	-5.58606E-10
ω	-2.52304E-13	5.90053E-12	7.97417E-10	-1.32452E-10	4.84981E-10	2.46298E-10
M	-1.05437E-12	7.95698E-12	2.06287E-9	-5.58606E-10	2.46298E-10	7.18768E-9

Date of computation: 2024-04-23 11:53 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

22.23

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

100 - 210*

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

1837

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.501104

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2019-03-04.297571

Unit

Source

[2]

Last Observation

Value

2024-03-14.389687

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

135 (0)

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 2019EM1 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	1952-02-28 21:02	< 1 min	0.1535189	0.1534896	0.0000098
EARTH	1957-03-04 21:45	< 1 min	0.1074339	0.1074189	0.0000050
EARTH	1963-02-27 23:19	< 1 min	0.0605747	0.0605666	0.0000027
EARTH	1968-03-09 14:01	< 1 min	0.1717843	0.1717828	0.0000005
EARTH	1974-02-28 22:06	< 1 min	0.0163907	0.0163778	0.0000043
EARTH	1980-02-28 23:04	< 1 min	0.1505291	0.1505236	0.0000018
EARTH	1985-03-06 01:37	< 1 min	0.1227920	0.1227907	0.0000004
EARTH	1991-02-28 10:24	< 1 min	0.0213762	0.0213658	0.0000035
EARTH	2002-03-02 16:32	< 1 min	0.0608708	0.0608642	0.0000022
EARTH	2008-02-28 14:46	< 1 min	0.1139791	0.1139736	0.0000018
EARTH	2013-03-07 10:41	< 1 min	0.1398771	0.1398751	0.0000007
EARTH	2019-02-28 15:11	< 1 min	0.0160273	0.0160271	0.0000001
EARTH	2024-03-11 16:07	< 1 min	0.1940559	0.1940540	0.0000007
EARTH	2030-03-01 12:12	< 1 min	0.0284188	0.0284137	0.0000017
EARTH	2036-02-29 13:39	< 1 min	0.1687014	0.1686951	0.0000021
EARTH	2041-03-04 04:32	< 1 min	0.0913665	0.0913614	0.0000017
EARTH	2047-02-28 09:12	< 1 min	0.0891298	0.0891237	0.0000020
EARTH	2052-03-08 01:27	< 1 min	0.1494671	0.1494627	0.0000014
EARTH	2058-02-28 12:47	< 1 min	0.0171817	0.0171769	0.0000016
EARTH	2063-03-11 21:39	< 1 min	0.1864447	0.1864440	0.0000002
EARTH	2069-02-28 18:53	< 1 min	0.0069051	0.0068968	0.0000028
EARTH	2075-03-01 06:55	< 1 min	0.1574191	0.1573637	0.0000184
EARTH	2080-03-06 01:38	2.6	0.1215943	0.1215170	0.0000258
EARTH	2086-02-28 14:44	1.1	0.0189201	0.0187687	0.0000505
EARTH	2097-03-03 01:23	1.7	0.0666543	0.0665836	0.0000236
EARTH	2103-03-01 17:47	< 1 min	0.1060365	0.1058184	0.0000727
EARTH	2108-03-09 01:49	8.2	0.1466784	0.1464571	0.0000738
EARTH	2114-03-01 22:26	3.5	0.0071712	0.0068016	0.0001236
EARTH	2119-03-12 22:17	45.3	0.1838404	0.1826571	0.0003948

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