Asteroids

152637 1997NC1 help

Last update: 2026-05-09 13:30 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.685

Aphelion (Q)

1.045

Eccentricity (e)

0.209

Inclination (i)

16.7

deg

Orbit period (P)

293.8

Earth MOID

0.01671

U parameter

0.1

Next Earth close approach

Date

2026-06-27

Nominal distance (from Earth center)

0.01715

2565833

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

17.8

mag

Diameter

440

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1997-07-05

Observatory

Haleakala-NEAT/GEODSS

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.864933

1-sigma variation

1.965E-9

Unit

Eccentricity (e)

Value

0.208573

1-sigma variation

6.915E-8

Unit

Inclination (i)

Value

16.7262

1-sigma variation

1.854E-5

Unit

Long. of Ascending Node (Ω)

Value

96.4469

1-sigma variation

1.411E-5

Unit

Arg. of Perihelion (ω)

Value

16.6134

1-sigma variation

2.897E-5

Unit

Mean Anomaly (M)

Value

131.00891

1-sigma variation

0.00004

Unit

Perihelion distance

Value

0.684531

1-sigma variation

Unit

Aphelion distance

Value

1.045334

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.294153

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.017266

1-sigma variation

Unit

MOID

Value

0.016713

1-sigma variation

Unit

Orbit Period

Value

293.8135

1-sigma variation

Unit

U parameter

Value

0.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.86005E-18	1.02009E-16	1.82666E-14	6.80283E-15	4.48986E-14	-7.87515E-14
e	1.02009E-16	4.78112E-15	7.39551E-13	1.90018E-13	1.19869E-12	-1.97223E-12
i	1.82666E-14	7.39551E-13	3.43580E-10	1.04849E-10	2.41274E-10	-3.93396E-10
Ω	6.80283E-15	1.90018E-13	1.04849E-10	1.99176E-10	-5.80723E-11	-1.44013E-10
ω	4.48986E-14	1.19869E-12	2.41274E-10	-5.80723E-11	8.39477E-10	-1.09747E-9
M	-7.87515E-14	-1.97223E-12	-3.93396E-10	-1.44013E-10	-1.09747E-9	1.79307E-9

Date of computation: 2026-05-09 13:30 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

[1]

[2]

Taxonomy (all)

Value

Unit

Source

[3]

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

17.781

Unit

mag

Source

[4]

Slope Parameter (G)

Value

0.15**

Unit

Source

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.58

Unit

Source

[5]

Diameter

Value

440

Unit

Source

[5]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.1137

-0.204

-0.09

Unit

r-i

i-z

r-z

Source

[1]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) A. V. Sergeyev, B. Carry et al A&A, 658 (2022) A109
[2]	EARN	1.) Whiteley, R.J. (2001) PhD. Thesis, University of Hawaii. (A Compositional and Dynamical Survey of the Near-Earth Asteroids)
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	ESA Aegis	ESA orbit determination and impact monitoring system
[5]	EARN	1.) Harris(DLR), A.W. et al. (2011) Astron. J. 141, 75. (ExploreNEOs. II. THE ACCURACY OF THE WARM SPITZER NEAR-EARTH OBJECT SURVEY) 2.) Trilling, D.E. et al. (2010) Astron. J. 140, 770-784. (EXPLORENEOs. I. DESCRIPTION AND FIRST RESULTS FROM THE WARM SPITZER NEAR-EARTH OBJECT SURVEY) (diameters & albedos for 101 NEOs)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

10533

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.557205

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1997-07-05.26125

Unit

Source

[2]

Last Observation

Value

2026-05-07.718854

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

389 (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

[-]

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 152637 1997NC1 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	1964-06-30 07:07	< 1 min	0.0550304	0.0550295	0.0000003
EARTH	1968-06-24 00:39	< 1 min	0.0900883	0.0900874	0.0000003
VENUS	1982-08-25 03:05	< 1 min	0.0412084	0.0412076	0.0000003
EARTH	1989-07-11 04:30	< 1 min	0.1817737	0.1817734	0.0000001
EARTH	1993-06-29 11:34	< 1 min	0.0409779	0.0409775	0.0000001
EARTH	1997-06-23 23:51	< 1 min	0.1010974	0.1010969	0.0000001
VENUS	2016-06-19 18:49	< 1 min	0.0329318	0.0329317	0.0000001
EARTH	2022-07-04 23:59	< 1 min	0.1103409	0.1103404	0.0000002
EARTH	2026-06-27 11:15	< 1 min	0.0171515	0.0171514	0.0000000
VENUS	2026-12-05 05:34	< 1 min	0.0315450	0.0315447	0.0000001
EARTH	2030-06-23 21:15	< 1 min	0.1320076	0.1320055	0.0000007
VENUS	2037-05-25 01:30	< 1 min	0.0364789	0.0364756	0.0000011
EARTH	2051-07-12 16:18	< 1 min	0.1964030	0.1963907	0.0000041
EARTH	2055-07-01 13:12	< 1 min	0.0640877	0.0640747	0.0000043
EARTH	2059-06-25 03:16	< 1 min	0.0696920	0.0696803	0.0000039
VENUS	2081-09-06 15:25	1.5	0.0306044	0.0306030	0.0000004
EARTH	2084-07-06 11:54	1.0	0.1363354	0.1363040	0.0000105
EARTH	2088-06-27 23:58	1.5	0.0245014	0.0244621	0.0000131
VENUS	2092-02-19 02:01	5.5	0.0351210	0.0350906	0.0000102
EARTH	2092-06-24 03:54	1.0	0.0802092	0.0801337	0.0000252
EARTH	2096-06-23 01:17	< 1 min	0.1811534	0.1810343	0.0000397
EARTH	2125-07-10 21:35	2.7	0.1754554	0.1753695	0.0000286

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
158.51641770	171.09130920	0.01671256	MINIMUM
330.26186607	333.69482935	0.28859865	MINIMUM
281.60678700	280.06833772	0.30465399	SADDLE
44.60980459	60.45846237	0.34638661	SADDLE
6.97603211	195.93548519	1.69895014	SADDLE
177.77070004	6.34971403	2.02742889	MAXIMUM

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MOID Plots

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