Asteroids

2021TZ12 help

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

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Amor

Perihelion (q)

1.060

Aphelion (Q)

1.338

Eccentricity (e)

0.116

Inclination (i)

12.0

deg

Orbit period (P)

479.4

Earth MOID

0.06421

U parameter

6.3

Next Earth close approach

Date

2042-10-05

Nominal distance (from Earth center)

0.06383

9549311

Maximum Brightness

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

25.1

mag

Diameter

25 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-10-11

Observatory

Mt. Lemmon Survey

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

1.198689

1-sigma variation

0.000071

Unit

Eccentricity (e)

Value

0.116024

1-sigma variation

0.000041

Unit

Inclination (i)

Value

11.9665

1-sigma variation

0.0027

Unit

Long. of Ascending Node (Ω)

Value

15.5780

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

343.1208

1-sigma variation

0.0010

Unit

Mean Anomaly (M)

Value

270.86543

1-sigma variation

0.08687

Unit

Perihelion distance

Value

1.059612

1-sigma variation

Unit

Aphelion distance

Value

1.337766

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.065626

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.329585

1-sigma variation

Unit

MOID

Value

0.064206

1-sigma variation

Unit

Orbit Period

Value

479.3562

1-sigma variation

Unit

U parameter

Value

6.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.99116E-9	2.90456E-9	1.88752E-7	-3.65158E-8	-6.48471E-8	-6.13737E-6
e	2.90456E-9	1.69031E-9	1.09838E-7	-2.12493E-8	-3.77486E-8	-3.57158E-6
i	1.88752E-7	1.09838E-7	7.14162E-6	-1.38175E-6	-2.47327E-6	-2.32082E-4
Ω	-3.65158E-8	-2.12493E-8	-1.38175E-6	2.67412E-7	4.79849E-7	4.48971E-5
ω	-6.48471E-8	-3.77486E-8	-2.47327E-6	4.79849E-7	1.05818E-6	7.95668E-5
M	-6.13737E-6	-3.57158E-6	-2.32082E-4	4.48971E-5	7.95668E-5	7.54695E-3

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

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

25.108

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

25 - 60*

Unit

Source

[2]

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]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

1341

Unit

Source

[1]

Normalized RMS of residuals

Value

0.741081

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-10-02.394954

Unit

Source

[2]

Last Observation

Value

2021-11-01.32634

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (1)

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 2021TZ12 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	1962-10-06 01:06	248.1	0.0707607	0.0641919	0.0047413
EARTH	1983-10-08 08:58	653.4	0.1364218	0.0992858	0.0132354
EARTH	2000-10-04 17:08	2.5	0.1632504	0.1334127	0.0101680
EARTH	2021-10-05 07:14	< 1 min	0.0750746	0.0750227	0.0000173
EARTH	2042-10-05 21:29	159.1	0.0638332	0.0637182	0.0006694
EARTH	2063-10-06 08:36	872.9	0.0661280	0.0635599	0.0142617
EARTH	2084-10-06 14:20	> 1 d	0.1034317	0.0643994	0.1565275
EARTH	2122-10-06 15:57	880.9	0.0909078	0.0633258	0.1244537

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
11.99355547	271.32347497	0.06459990	MINIMUM
142.41858231	43.27967448	0.36977530	SADDLE
348.48793313	65.31600980	2.05198976	SADDLE
176.94580765	253.83890795	2.34023347	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out