Asteroids

188174 2002JC help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.499

Aphelion (Q)

1.139

Eccentricity (e)

0.391

Inclination (i)

40.9

deg

Orbit period (P)

270.7

Earth MOID

0.09356

U parameter

0.4

Next Earth close approach

Date

2031-06-02

Nominal distance (from Earth center)

0.18857

28210336

Maximum Brightness

17.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

17.5

mag

Diameter

900 - 1900*

Taxonomic type

Rotation period (T)

2.746

Discovery Information

Discovery Date

2002-05-01

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

0.818908

1-sigma variation

2.483E-9

Unit

Eccentricity (e)

Value

0.390675

1-sigma variation

1.575E-7

Unit

Inclination (i)

Value

40.8579

1-sigma variation

1.186E-5

Unit

Long. of Ascending Node (Ω)

Value

69.3816

1-sigma variation

2.535E-6

Unit

Arg. of Perihelion (ω)

Value

306.9109

1-sigma variation

1.654E-5

Unit

Mean Anomaly (M)

Value

96.90950

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.498981

1-sigma variation

Unit

Aphelion distance

Value

1.138835

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.424045

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.108782

1-sigma variation

Unit

MOID

Value

0.093556

1-sigma variation

Unit

Orbit Period

Value

270.6769

1-sigma variation

Unit

U parameter

Value

0.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.16698E-18	7.03787E-17	-2.62468E-17	6.51901E-16	-2.57234E-15	-5.49535E-14
e	7.03787E-17	2.47987E-14	6.97467E-14	2.80978E-13	-1.77836E-12	3.33282E-12
i	-2.62468E-17	6.97467E-14	1.40714E-10	-1.54856E-11	-2.66984E-11	4.42702E-11
Ω	6.51901E-16	2.80978E-13	-1.54856E-11	6.42541E-12	-2.55569E-11	4.00490E-11
ω	-2.57234E-15	-1.77836E-12	-2.66984E-11	-2.55569E-11	2.73617E-10	-3.71119E-10
M	-5.49535E-14	3.33282E-12	4.42702E-11	4.00490E-11	-3.71119E-10	1.22313E-9

Date of computation: 2025-09-10 00:30 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

2.746

Unit

Source

[1]

Quality

Value

Unit

Source

[1]

Amplitude

Value

0.26-0.4

Unit

mag

Source

[1]

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

17.454

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[3]

Diameter

Value

900 - 1900*

Unit

Source

[3]

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

[4]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Warner, B.D. (2014) MPB 41, 213-224. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2014 MARCH-JUNE) (38 NEA lightcurve data) 2.) Polishook, D. et al. (2005) ACM2005-Abstr, p. 60-61. (photometry of Atens) ((86450) 2000 CK33, (86667)2000 FO10, (85989) 1999JD6,2002CQ11 )
[2]	ESA Aegis	ESA orbit determination and impact monitoring system
[3]	Estimation	Estimated from absolute magnitude
[4]	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

12458

Unit

Source

[1]

Unobserved

Value

136

Unit

Source

[1]

Normalized RMS of residuals

Value

0.516244

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1991-05-16.41042

Unit

Source

[2]

Last Observation

Value

2025-06-24.190833

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

539 (3)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2014-05-24

Unit

Source

[3]

Last Observation

Value

2014-05-26

Unit

Source

[3]

Delay (Discarded)

Value

3 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

3 (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 188174 2002JC 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	1951-05-27 04:02	< 1 min	0.0936276	0.0936267	0.0000003
EARTH	1971-05-28 22:17	< 1 min	0.0967049	0.0967039	0.0000003
EARTH	1974-05-20 11:26	< 1 min	0.1962546	0.1962520	0.0000009
EARTH	1991-05-30 14:39	< 1 min	0.1165842	0.1165830	0.0000004
EARTH	1994-05-22 12:03	< 1 min	0.1572874	0.1572860	0.0000004
EARTH	2011-06-01 05:40	< 1 s	0.1478015	0.1478010	0.0000002
EARTH	2014-05-24 08:43	< 1 s	0.1251471	0.1251471	0.0000000
EARTH	2031-06-02 23:03	< 1 min	0.1885744	0.1885732	0.0000004
EARTH	2034-05-26 09:36	< 1 min	0.0989822	0.0989816	0.0000002
EARTH	2054-05-28 01:07	< 1 min	0.0920114	0.0920111	0.0000001
EARTH	2074-05-29 15:56	< 1 min	0.1019741	0.1019718	0.0000008
EARTH	2077-05-21 08:18	< 1 min	0.1815911	0.1815862	0.0000016
EARTH	2094-05-31 12:08	< 1 min	0.1303728	0.1303674	0.0000018
EARTH	2097-05-23 11:53	< 1 min	0.1412902	0.1412844	0.0000019
EARTH	2114-06-03 00:59	< 1 min	0.1633847	0.1633771	0.0000025
EARTH	2117-05-26 08:39	< 1 min	0.1116925	0.1116872	0.0000018

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
248.96348432	143.37059765	0.09194668	MINIMUM
49.49138491	340.38224583	0.40096407	MINIMUM
336.35139605	241.62613429	0.70028586	SADDLE
139.02789434	68.08118218	0.70935026	SADDLE
342.80803126	74.07581853	1.42720276	SADDLE
194.36946020	290.57385626	2.06533698	MAXIMUM

Download:

MOID Plots

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