Asteroids

2019CO1 help

Last update: 2026-02-13 20:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.945

Aphelion (Q)

1.268

Eccentricity (e)

0.146

Inclination (i)

17.9

deg

Orbit period (P)

425.2

Earth MOID

0.00744

U parameter

1.9

Next Earth close approach

Date

2032-08-03

Nominal distance (from Earth center)

0.14142

21155821

Maximum Brightness

22.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.7

mag

Diameter

50 - 110*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2019-02-04

Observatory

Pan-STARRS 1, Haleakala

ORBIT VISUALISATION TOOLS

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.106668

1-sigma variation

7.474E-8

Unit

Eccentricity (e)

Value

0.146108

1-sigma variation

0.000001

Unit

Inclination (i)

Value

17.9307

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

319.1903

1-sigma variation

1.844E-5

Unit

Arg. of Perihelion (ω)

Value

58.6575

1-sigma variation

0.0004

Unit

Mean Anomaly (M)

Value

42.63693

1-sigma variation

0.00041

Unit

Perihelion distance

Value

0.944974

1-sigma variation

Unit

Aphelion distance

Value

1.268361

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.007865

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.185058

1-sigma variation

Unit

MOID

Value

0.007442

1-sigma variation

Unit

Orbit Period

Value

425.2305

1-sigma variation

Unit

U parameter

Value

1.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.58666E-15	-5.10184E-14	3.52184E-12	3.49459E-13	-1.03023E-11	1.79737E-11
e	-5.10184E-14	1.12810E-12	9.83896E-11	9.39812E-12	-2.07496E-10	1.10619E-10
i	3.52184E-12	9.83896E-11	2.87070E-8	2.59830E-9	-6.56418E-8	6.52745E-8
Ω	3.49459E-13	9.39812E-12	2.59830E-9	3.40062E-10	-6.46684E-9	6.36611E-9
ω	-1.03023E-11	-2.07496E-10	-6.56418E-8	-6.46684E-9	1.56591E-7	-1.58453E-7
M	1.79737E-11	1.10619E-10	6.52745E-8	6.36611E-9	-1.58453E-7	1.72024E-7

Date of computation: 2026-02-13 20:30 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

23.69

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

50 - 110*

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 Aegis	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

2562

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.723578

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2019-02-04.42589

Unit

Source

[2]

Last Observation

Value

2026-02-09.358717

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

51 (1)

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

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2019CO1 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1970-08-09 21:31	8.5	0.0320732	0.0317827	0.0000969
EARTH	1971-02-04 06:19	16.7	0.1996087	0.1995043	0.0000348
EARTH	1977-08-17 09:00	10.5	0.0897932	0.0894484	0.0001149
EARTH	1978-01-26 14:49	14.1	0.1741683	0.1741547	0.0000046
EARTH	2011-08-02 23:18	1.7	0.1575486	0.1574735	0.0000250
EARTH	2018-08-11 04:05	< 1 min	0.0132551	0.0132463	0.0000030
EARTH	2019-02-03 14:43	< 1 min	0.1906066	0.1906027	0.0000013
EARTH	2025-08-08 21:04	< 1 min	0.0461202	0.0461085	0.0000039
EARTH	2032-08-03 04:41	< 1 min	0.1414179	0.1414154	0.0000008
EARTH	2075-08-22 10:36	1.5	0.1539512	0.1538939	0.0000191
EARTH	2076-01-24 17:12	2.0	0.1708518	0.1708386	0.0000044
EARTH	2082-08-16 07:33	1.8	0.0698018	0.0697428	0.0000197
EARTH	2083-01-29 07:24	2.7	0.1705298	0.1705200	0.0000032
EARTH	2089-08-12 17:19	1.1	0.0176232	0.0175903	0.0000110
EARTH	2090-01-31 21:08	1.0	0.1831907	0.1831757	0.0000050
EARTH	2096-08-17 05:07	6.1	0.0907633	0.0905590	0.0000681
EARTH	2097-01-26 14:07	8.7	0.1725466	0.1725416	0.0000017
EARTH	2103-08-26 05:15	10.4	0.1894208	0.1890278	0.0001310
EARTH	2104-01-22 15:54	11.2	0.1867840	0.1866576	0.0000423

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
307.85295633	218.07747096	0.00744219	MINIMUM
99.73308371	24.72147346	0.16700022	MINIMUM
27.42207514	308.95699614	0.30556338	SADDLE
203.00112502	115.14417867	0.42333777	SADDLE
1.38750781	97.98776561	1.93018150	SADDLE
166.16401085	262.35777589	2.25229862	MAXIMUM

Download:

MOID Plots

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