Asteroids

5496 1973NA help

Last update: 2025-10-25 16:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.891

Aphelion (Q)

3.982

Eccentricity (e)

0.634

Inclination (i)

68.0

deg

Orbit period (P)

1389.3

Earth MOID

0.09453

U parameter

0.0

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

16.2

mag

Diameter

1880

Taxonomic type

Rotation period (T)

2.855

Discovery Information

Discovery Date

1973-07-04

Observatory

Palomar Mountain

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

2.436698

1-sigma variation

5.421E-9

Unit

Eccentricity (e)

Value

0.634230

1-sigma variation

7.167E-8

Unit

Inclination (i)

Value

68.0152

1-sigma variation

2.599E-5

Unit

Long. of Ascending Node (Ω)

Value

101.0217

1-sigma variation

9.744E-6

Unit

Arg. of Perihelion (ω)

Value

117.9198

1-sigma variation

1.374E-5

Unit

Mean Anomaly (M)

Value

299.21802

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.891270

1-sigma variation

Unit

Aphelion distance

Value

3.982126

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.088350

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.104845

1-sigma variation

Unit

MOID

Value

0.094529

1-sigma variation

Unit

Orbit Period

Value

1389.3160

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.93883E-17	-1.12120E-16	-2.49639E-14	-4.63304E-15	1.42841E-14	-3.99962E-14
e	-1.12120E-16	5.13614E-15	-1.33112E-13	3.32772E-14	5.22185E-13	-4.38030E-15
i	-2.49639E-14	-1.33112E-13	6.75443E-10	-1.20613E-10	4.32288E-11	-8.87376E-12
Ω	-4.63304E-15	3.32772E-14	-1.20613E-10	9.49359E-11	-4.15728E-11	1.49512E-11
ω	1.42841E-14	5.22185E-13	4.32288E-11	-4.15728E-11	1.88685E-10	-7.70253E-11
M	-3.99962E-14	-4.38030E-15	-8.87376E-12	1.49512E-11	-7.70253E-11	9.17434E-11

Date of computation: 2025-10-25 16:00 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

2.855

Unit

Source

[5]

Quality

Value

Unit

Source

[5]

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

X:C

Unit

Source

[3]

[4]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

16.194

Unit

mag

Source

[6]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[6]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05

Unit

Source

[1]

Diameter

Value

1880

Unit

Source

[1]

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]	EARN	1.) N. G. Simion et al, Spectral properties of near-Earth objects with low-Jovian Tisserand invariant (2021)
[2]	EARN	1.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) DeMeo, F. & R.P. Binzel (2008) Icarus 194, 436-449. (Comets in the near-Earth object population) () 2.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)
[5]	EARN	1.) Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html
[6]	ESA Aegis	ESA orbit determination and impact monitoring system

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

17804

Unit

Source

[1]

Unobserved

Value

1328

Unit

Source

[1]

Normalized RMS of residuals

Value

0.533138

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1973-07-04.27153

Unit

Source

[2]

Last Observation

Value

2022-04-02.124538

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

247 (11)

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

Close Approaches for 5496 1973NA 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	1954-07-04 20:44	< 1 min	0.1007272	0.1007253	0.0000006
EARTH	1973-07-02 07:37	< 1 min	0.0798422	0.0798414	0.0000002
EARTH	1992-06-26 22:30	< 1 min	0.1522808	0.1522799	0.0000003

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
30.39765728	178.81840419	0.09452933	MINIMUM
308.44555764	10.26757286	0.71199522	MINIMUM
345.52229567	81.26239827	1.08407785	SADDLE
349.81027877	284.14792199	1.59388822	SADDLE
168.21700767	317.70041907	3.54440491	SADDLE
189.81783544	149.55819736	4.66141505	MAXIMUM

Download:

MOID Plots

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