Asteroids

163348 2002NN4 help

Last update: 2024-04-25 08:10 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.495

Aphelion (Q)

1.256

Eccentricity (e)

0.435

Inclination (i)

5.4

deg

Orbit period (P)

299.4

Earth MOID

0.00685

U parameter

0.8

A₂

33.8

10^-15au/days²

Next Earth close approach

Date

2029-06-07

Nominal distance (from Earth center)

0.05886

8805646

Maximum Brightness

17.9

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

20.1

mag

Diameter

590

Taxonomic type

Rotation period (T)

14.5

Discovery Information

Discovery Date

2002-07-09

Observatory

Lincoln Laboratory ETS, New Mexico

Orbit Visualiser

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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

0.875802

1-sigma variation

7.330E-9

Unit

Eccentricity (e)

Value

0.434526

1-sigma variation

7.448E-8

Unit

Inclination (i)

Value

5.4201

1-sigma variation

3.395E-6

Unit

Long. of Ascending Node (Ω)

Value

259.4275

1-sigma variation

9.780E-6

Unit

Arg. of Perihelion (ω)

Value

222.2051

1-sigma variation

9.969E-6

Unit

Mean Anomaly (M)

Value

327.28503

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.495243

1-sigma variation

Unit

Aphelion distance

Value

1.256361

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.032649

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.446536

1-sigma variation

Unit

MOID

Value

0.006851

1-sigma variation

Unit

Orbit Period

Value

299.3695

1-sigma variation

Unit

U parameter

Value

0.8

1-sigma variation

Unit

A₂

Value

33.77016

1-sigma variation

9.86239

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	5.37347E-17	4.66003E-16	3.74073E-15	-4.12134E-15	5.15740E-15	-1.93103E-13	7.14639E-8
e	4.66003E-16	5.54720E-15	6.69540E-14	-2.88882E-14	4.57836E-14	-1.87774E-12	5.86418E-7
i	3.74073E-15	6.69540E-14	1.15284E-11	1.39790E-11	-1.28544E-11	-1.91602E-11	4.15199E-6
Ω	-4.12134E-15	-2.88882E-14	1.39790E-11	9.56575E-11	-9.11437E-11	8.07340E-12	-6.69056E-6
ω	5.15740E-15	4.57836E-14	-1.28544E-11	-9.11437E-11	9.93882E-11	-3.28468E-11	1.05636E-5
M	-1.93103E-13	-1.87774E-12	-1.91602E-11	8.07340E-12	-3.28468E-11	7.55179E-10	-2.56813E-4
A₂	7.14639E-8	5.86418E-7	4.15199E-6	-6.69056E-6	1.05636E-5	-2.56813E-4	9.72668E1

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

14.5

Unit

Source

[3]

Quality

Value

Unit

Source

[3]

Amplitude

Value

0.74

Unit

mag

Source

[3]

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]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.07

Unit

mag

Source

[4]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.0298

0.048

Unit

Source

[5]

[6]

Diameter

Value

590

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

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	EARN	1.) Warner, B.D. (2017) MPB 44, 22-36. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2016 JULY-SEPTEMBER) (46 NEAs)
[4]	ESA ODIM	ESA orbit determination and impact monitoring system
[5]	EARN	1.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs)
[6]	EARN	1.) Joseph R. Masiero et al 2021 Planet. Sci. J. 2 162

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

6996

Unit

Source

[1]

Unobserved

Value

972

Unit

Source

[1]

Normalized RMS of residuals

Value

0.550463

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2002-07-02.446

Unit

Source

[2]

Last Observation

Value

2021-08-27.472455

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

708 (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 163348 2002NN4 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	1952-08-26 14:28	> 1 d	0.1943710	0.1858104	0.0028791
EARTH	1956-06-09 16:57	516.8	0.1056754	0.0947603	0.0036408
EARTH	1965-06-06 04:05	1.1	0.0077366	0.0076534	0.0000317
EARTH	1966-09-09 12:51	6.8	0.1705797	0.1702176	0.0001207
EARTH	1974-06-10 19:55	5.6	0.1803311	0.1799888	0.0001141
EARTH	1975-09-13 01:55	2.5	0.1026315	0.1025127	0.0000397
EARTH	1979-06-27 05:20	28.8	0.1982430	0.1980871	0.0000520
EARTH	1988-06-06 15:39	4.0	0.0579420	0.0576897	0.0000841
EARTH	1997-06-07 21:02	1.9	0.0955144	0.0953720	0.0000475
EARTH	1998-09-12 07:00	1.1	0.1062985	0.1062426	0.0000187
EARTH	2007-09-09 00:21	1.5	0.1421426	0.1421227	0.0000066
EARTH	2011-06-18 18:02	< 1 min	0.1618608	0.1618536	0.0000024
EARTH	2020-06-06 03:19	< 1 min	0.0340481	0.0340428	0.0000018
EARTH	2029-06-07 01:06	< 1 min	0.0588621	0.0588036	0.0000195
EARTH	2030-09-11 01:01	< 1 min	0.1325396	0.1324911	0.0000162
EARTH	2038-06-10 13:55	2.0	0.1699043	0.1697680	0.0000454
EARTH	2039-09-13 04:60	< 1 min	0.0967816	0.0967528	0.0000096
EARTH	2048-09-06 03:54	17.4	0.1535142	0.1533145	0.0000666
EARTH	2052-06-18 08:26	30.2	0.1628424	0.1625884	0.0000847
EARTH	2061-06-07 20:52	13.5	0.0763330	0.0758271	0.0001687
EARTH	2070-06-06 14:44	1.6	0.0101656	0.0097189	0.0001511
EARTH	2071-09-10 15:47	< 1 min	0.1606965	0.1604046	0.0000973
EARTH	2080-09-09 02:20	96.8	0.1411931	0.1395927	0.0005356
EARTH	2084-06-13 22:60	219.0	0.1393724	0.1367044	0.0008894
EARTH	2093-06-07 10:30	59.4	0.0707581	0.0655137	0.0017487
EARTH	2094-09-12 09:13	59.4	0.1158836	0.1131494	0.0009388
EARTH	2103-09-04 13:09	330.1	0.1726070	0.1698469	0.0009232
EARTH	2107-06-11 07:20	191.8	0.1027970	0.0984626	0.0014450
EARTH	2116-06-09 20:09	78.2	0.1272590	0.1219219	0.0017791
EARTH	2117-09-14 10:50	21.3	0.0961405	0.0960964	0.0000517

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