Asteroids

3360 Syrinx help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.620

Aphelion (Q)

4.310

Eccentricity (e)

0.748

Inclination (i)

21.0

deg

Orbit period (P)

1413.6

Earth MOID

0.10870

U parameter

0.0

Next Earth close approach

Date

2085-11-02

Nominal distance (from Earth center)

0.16317

24409395

Maximum Brightness

14.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

3170

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1981-11-04

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.465020

1-sigma variation

8.398E-9

Unit

Eccentricity (e)

Value

0.748330

1-sigma variation

3.054E-8

Unit

Inclination (i)

Value

21.0114

1-sigma variation

7.295E-6

Unit

Long. of Ascending Node (Ω)

Value

241.8926

1-sigma variation

1.436E-5

Unit

Arg. of Perihelion (ω)

Value

64.0364

1-sigma variation

1.407E-5

Unit

Mean Anomaly (M)

Value

202.08988

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.620371

1-sigma variation

Unit

Aphelion distance

Value

4.309668

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.195451

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.625626

1-sigma variation

Unit

MOID

Value

0.108698

1-sigma variation

Unit

Orbit Period

Value

1413.6080

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.05288E-17	-5.71830E-17	1.54905E-14	-1.36207E-14	1.20506E-15	-4.60738E-14
e	-5.71830E-17	9.32968E-16	2.02056E-14	4.13999E-14	-5.74758E-14	2.66856E-14
i	1.54905E-14	2.02056E-14	5.32181E-11	2.04914E-12	-1.80439E-12	-6.38800E-12
Ω	-1.36207E-14	4.13999E-14	2.04914E-12	2.06312E-10	-1.87425E-10	-6.47343E-12
ω	1.20506E-15	-5.74758E-14	-1.80439E-12	-1.87425E-10	1.97958E-10	6.22260E-13
M	-4.60738E-14	2.66856E-14	-6.38800E-12	-6.47343E-12	6.22260E-13	4.55519E-11

Date of computation: 2026-03-17 23:26 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

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

15.995

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.076

0.1175

0.07

Unit

Source

[2]

[3]

[4]

Diameter

Value

3170

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.828

0.407

0.398

Unit

B-V

V-R

R-I

Source

[5]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	EARN	1.) Joseph R. Masiero et al 2021 Planet. Sci. J. 2 162
[3]	EARN	1.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs)
[4]	EARN	1.) Veeder, G.J. et al. (1989) Astron. J. 97, 1211-1219. (Radiometry of near-earth asteroids)
[5]	EARN	1.) Lin, C-H. et al. (2018) P&SS 152, 116-135. (Photometric survey and taxonomic identifications of 92 near-Earth asteroids)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

16137

Unit

Source

[1]

Unobserved

Value

143

Unit

Source

[1]

Normalized RMS of residuals

Value

0.470539

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1981-11-04.32187

Unit

Source

[2]

Last Observation

Value

2026-01-09.499661

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

595 (4)

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 3360 Syrinx 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	1962-05-10 14:37	< 1 min	0.1474070	0.1474067	0.0000001
EARTH	2085-11-02 09:28	< 1 min	0.1631667	0.1631644	0.0000008
EARTH	2108-10-25 19:37	< 1 min	0.1938252	0.1938231	0.0000007

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
325.07385242	125.56972952	0.10986598	MINIMUM
39.98360014	294.62198641	0.18802697	MINIMUM
4.32849654	215.97227262	0.47842919	SADDLE
0.97234541	26.43607368	1.58715983	SADDLE
180.72425559	23.22079826	3.39237054	SADDLE
179.38325514	202.68899628	5.28245095	MAXIMUM

Download:

MOID Plots

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