Asteroids

442037 2010PR66 help

Last update: 2025-09-10 09:18 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.915

Aphelion (Q)

4.941

Eccentricity (e)

0.687

Inclination (i)

17.6

deg

Orbit period (P)

1830.1

Earth MOID

0.00257

U parameter

0.0

Next Earth close approach

Date

2065-07-19

Nominal distance (from Earth center)

0.04596

6875848

Maximum Brightness

16.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.3

mag

Diameter

678

Taxonomic type

Rotation period (T)

2.734

Discovery Information

Discovery Date

2010-08-15

Observatory

Lincoln Laboratory ETS, New Mexico

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

2.928058

1-sigma variation

1.293E-9

Unit

Eccentricity (e)

Value

0.687406

1-sigma variation

8.529E-9

Unit

Inclination (i)

Value

17.6036

1-sigma variation

5.912E-6

Unit

Long. of Ascending Node (Ω)

Value

292.7475

1-sigma variation

5.255E-6

Unit

Arg. of Perihelion (ω)

Value

319.5253

1-sigma variation

5.563E-6

Unit

Mean Anomaly (M)

Value

29.00022

1-sigma variation

7.123E-7

Unit

Perihelion distance

Value

0.915294

1-sigma variation

Unit

Aphelion distance

Value

4.940822

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.003598

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

2.252890

1-sigma variation

Unit

MOID

Value

0.002570

1-sigma variation

Unit

Orbit Period

Value

1830.0708

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.67242E-18	-3.50186E-18	-8.86204E-16	-5.23059E-16	2.15155E-15	-8.34680E-16
e	-3.50186E-18	7.27488E-17	-1.45988E-14	-2.70933E-14	6.21720E-15	5.03867E-16
i	-8.86204E-16	-1.45988E-14	3.49532E-11	2.27830E-11	-1.62942E-11	-4.88918E-13
Ω	-5.23059E-16	-2.70933E-14	2.27830E-11	2.76099E-11	-2.42322E-11	4.33948E-13
ω	2.15155E-15	6.21720E-15	-1.62942E-11	-2.42322E-11	3.09441E-11	-1.22843E-12
M	-8.34680E-16	5.03867E-16	-4.88918E-13	4.33948E-13	-1.22843E-12	5.07372E-13

Date of computation: 2025-09-10 09:18 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

2.734

Unit

Source

[4]

Quality

Value

Unit

Source

[4]

Amplitude

Value

0.9

Unit

mag

Source

[4]

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

[1]

[2]

Taxonomy (all)

Value

Unit

Source

[3]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

19.254

Unit

mag

Source

[5]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.068

Unit

Source

[6]

Diameter

Value

678

Unit

Source

[6]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[7]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[2]	EARN	1.) N. G. Simion et al, Spectral properties of near-Earth objects with low-Jovian Tisserand invariant (2021)
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) Warner, B.D. (2016) MPB 43, 66-79. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2015 JUNE-SEPTEMBER)(36 NEAs)
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	EARN	1.) Masiero, J.R. et al. (2015) Astrophys. J. 809, 179(8p). (THE EUPHROSYNE FAMILY'S CONTRIBUTION TO THE LOW ALBEDO NEAR-EARTH ASTEROIDS) (...) 2.) Mainzer, A. et al. (2014) Astrophys. J. 784, 110. (The Population of Tiny Near-Earth Objects Observed by NEOWISE) 3.) Mainzer, A.; Bauer, J.; Grav, T.; Masiero, J.; et al. (2014) Astrophys. J. 784, A110.
[7]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

5606

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.4486

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2010-04-18.280903

Unit

Source

[2]

Last Observation

Value

2025-08-23.267152

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

664 (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

2015-07-27

Unit

Source

[3]

Last Observation

Value

2015-07-29

Unit

Source

[3]

Delay (Discarded)

Value

4 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

4 (0)

Unit

Source

[1]

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
[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 442037 2010PR66 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	2005-08-03 17:18	< 1 s	0.1866462	0.1866458	0.0000001
EARTH	2010-07-22 16:11	< 1 s	0.0264444	0.0264442	0.0000001
EARTH	2015-07-21 09:26	< 1 s	0.0630349	0.0630349	0.0000000
EARTH	2020-07-27 03:46	< 1 s	0.1440676	0.1440675	0.0000000
EARTH	2025-07-30 00:16	< 1 s	0.1796145	0.1796144	0.0000001
EARTH	2065-07-19 18:44	< 1 min	0.0459622	0.0459609	0.0000004
EARTH	2070-07-02 03:07	< 1 min	0.1111025	0.1111017	0.0000003
EARTH	2075-07-05 16:08	< 1 s	0.0624212	0.0624210	0.0000001
EARTH	2080-07-17 10:40	< 1 min	0.0588779	0.0588768	0.0000004
EARTH	2085-07-23 00:53	< 1 min	0.1118219	0.1118207	0.0000004
EARTH	2090-07-21 11:03	< 1 min	0.0849502	0.0849493	0.0000003
EARTH	2095-07-22 06:14	< 1 min	0.0962875	0.0962871	0.0000002
EARTH	2100-07-26 21:58	< 1 min	0.1561924	0.1561918	0.0000002

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
18.19760816	191.97547175	0.00256981	MINIMUM
359.08924324	329.67039182	1.89130196	SADDLE
179.40127484	332.16076252	3.97933909	SADDLE
180.57333788	152.66213014	5.94065218	MAXIMUM

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MOID Plots

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