Asteroids

136770 1996PC1 help

Last update: 2025-04-09 07:59 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

1.008

Aphelion (Q)

2.668

Eccentricity (e)

0.452

Inclination (i)

25.1

deg

Orbit period (P)

910.4

Earth MOID

0.08948

U parameter

0.0

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

20.5

mag

Diameter

210 - 500*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1996-08-11

Observatory

Siding Spring Observatory

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.838347

1-sigma variation

1.226E-9

Unit

Eccentricity (e)

Value

0.451527

1-sigma variation

6.147E-8

Unit

Inclination (i)

Value

25.0981

1-sigma variation

1.935E-5

Unit

Long. of Ascending Node (Ω)

Value

326.2105

1-sigma variation

4.913E-6

Unit

Arg. of Perihelion (ω)

Value

45.9438

1-sigma variation

2.953E-5

Unit

Mean Anomaly (M)

Value

166.31967

1-sigma variation

0.00001

Unit

Perihelion distance

Value

1.008283

1-sigma variation

Unit

Aphelion distance

Value

2.668411

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.102203

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.145421

1-sigma variation

Unit

MOID

Value

0.089476

1-sigma variation

Unit

Orbit Period

Value

910.4155

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.50205E-18	1.07394E-17	1.46024E-14	7.66198E-16	1.32683E-14	-8.00239E-15
e	1.07394E-17	3.77822E-15	-8.67342E-14	1.82263E-14	1.36020E-12	-4.25196E-13
i	1.46024E-14	-8.67342E-14	3.74544E-10	3.51974E-11	7.82208E-11	-4.37510E-11
Ω	7.66198E-16	1.82263E-14	3.51974E-11	2.41421E-11	-1.44109E-11	-1.51534E-12
ω	1.32683E-14	1.36020E-12	7.82208E-11	-1.44109E-11	8.71949E-10	-2.79142E-10
M	-8.00239E-15	-4.25196E-13	-4.37510E-11	-1.51534E-12	-2.79142E-10	1.04465E-10

Date of computation: 2025-04-09 07:59 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

S/Sr

Unit

Source

[1]

[2]

Taxonomy (all)

Value

S/Sr

Unit

Source

[3]

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.487

Unit

mag

Source

[4]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[5]

Diameter

Value

210 - 500*

Unit

Source

[5]

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

[6]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	EARN	1.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	ESA Aegis	ESA orbit determination and impact monitoring system
[5]	Estimation	Estimated from absolute magnitude
[6]	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

9304

Unit

Source

[1]

Unobserved

Value

1259

Unit

Source

[1]

Normalized RMS of residuals

Value

0.633463

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1996-08-11.63078

Unit

Source

[2]

Last Observation

Value

2022-01-31.347109

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

255 (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

Close Approaches for 136770 1996PC1 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	1981-08-31 02:26	< 1 s	0.1734795	0.1734790	0.0000002
EARTH	1986-08-28 15:09	< 1 s	0.1268085	0.1268081	0.0000001
EARTH	1991-08-26 14:42	< 1 s	0.0980027	0.0980024	0.0000001
EARTH	1996-08-24 03:58	< 1 s	0.0892995	0.0892992	0.0000001
EARTH	2001-08-22 15:13	< 1 s	0.0962148	0.0962145	0.0000001
EARTH	2006-08-20 13:44	< 1 s	0.1242301	0.1242298	0.0000001
EARTH	2011-08-17 19:17	< 1 s	0.1762464	0.1762461	0.0000001

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
334.35681497	229.44264182	0.08947559	MINIMUM
185.57884745	90.15304313	1.74768141	SADDLE
3.52429714	93.83833146	1.98179591	SADDLE
176.38535082	264.50145592	3.63598921	MAXIMUM

Download:

MOID Plots

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