Asteroids

1994WR12 help

Last update: 2024-05-03 14:36 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.456

Aphelion (Q)

1.058

Eccentricity (e)

0.397

Inclination (i)

6.8

deg

Orbit period (P)

240.5

Earth MOID

0.00181

U parameter

1.0

A₂

-217.5

10^-15au/days²

Next Earth close approach

Date

2026-01-14

Nominal distance (from Earth center)

0.0958

14331176

Maximum Brightness

20.3

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

22.4

mag

Diameter

90 - 200*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1994-11-28

Observatory

Palomar Mountain

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.756816

1-sigma variation

6.996E-9

Unit

Eccentricity (e)

Value

0.397439

1-sigma variation

1.335E-7

Unit

Inclination (i)

Value

6.8466

1-sigma variation

9.509E-6

Unit

Long. of Ascending Node (Ω)

Value

62.5244

1-sigma variation

1.199E-5

Unit

Arg. of Perihelion (ω)

Value

206.0325

1-sigma variation

1.503E-5

Unit

Mean Anomaly (M)

Value

334.56511

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.456028

1-sigma variation

Unit

Aphelion distance

Value

1.057604

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.004721

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.543086

1-sigma variation

Unit

MOID

Value

0.001813

1-sigma variation

Unit

Orbit Period

Value

240.4826

1-sigma variation

Unit

U parameter

Value

1.0

1-sigma variation

Unit

A₂

Value

-217.48290

1-sigma variation

10.10000

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	4.89473E-17	-8.35586E-16	-4.44580E-14	-2.13231E-14	-5.96002E-14	9.87670E-14	7.04977E-8
e	-8.35586E-16	1.78198E-14	8.74615E-13	3.32039E-13	1.35983E-12	-2.44302E-12	-1.19824E-6
i	-4.44580E-14	8.74615E-13	9.04252E-11	7.62046E-11	1.44023E-11	-1.29063E-10	-6.05501E-5
Ω	-2.13231E-14	3.32039E-13	7.62046E-11	1.43774E-10	-6.60474E-11	-1.42169E-10	-2.46946E-5
ω	-5.96002E-14	1.35983E-12	1.44023E-11	-6.60474E-11	2.26034E-10	-2.66239E-10	-8.75187E-5
M	9.87670E-14	-2.44302E-12	-1.29063E-10	-1.42169E-10	-2.66239E-10	7.83169E-10	1.31803E-4
A₂	7.04977E-8	-1.19824E-6	-6.05501E-5	-2.46946E-5	-8.75187E-5	1.31803E-4	1.02009E2

Date of computation: 2024-04-23 10:08 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

22.394

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

90 - 200*

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 ODIM	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

10645

Unit

Source

[1]

Unobserved

Value

106

Unit

Source

[1]

Normalized RMS of residuals

Value

0.639316

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1994-11-26.48611

Unit

Source

[2]

Last Observation

Value

2024-01-18.188363

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

142 (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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 1994WR12 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1951-12-13 12:09	> 1 d	0.0842015	0.0726821	0.0039784
EARTH	1953-12-28 09:58	> 1 d	0.0961566	0.0961419	0.0000891
EARTH	1956-01-11 15:33	> 1 d	0.0913746	0.0912145	0.0005665
EARTH	1958-01-17 16:11	649.1	0.1067769	0.0943592	0.0062258
EARTH	1960-01-18 22:12	166.5	0.1604733	0.1290517	0.0113204
VENUS	1968-12-17 19:41	662.3	0.0368656	0.0250241	0.0104924
VENUS	1975-05-13 09:36	286.9	0.0419515	0.0408524	0.0014381
VENUS	1977-07-28 08:01	188.0	0.0293468	0.0251295	0.0024399
EARTH	1990-11-22 19:03	25.4	0.1418532	0.1382409	0.0012041
EARTH	1992-11-21 19:51	10.0	0.0630320	0.0613165	0.0005718
EARTH	1994-11-24 20:21	9.5	0.0047469	0.0045330	0.0000718
MERCURY	1996-08-21 19:45	34.2	0.0159056	0.0158787	0.0000090
EARTH	1996-12-14 04:51	26.5	0.0856586	0.0855816	0.0000257
EARTH	1999-01-09 14:55	14.8	0.0918618	0.0918545	0.0000025
EARTH	2001-01-17 12:06	< 1 min	0.1400843	0.1399394	0.0000483
MERCURY	2006-07-07 10:12	15.2	0.0161136	0.0161035	0.0000034
VENUS	2013-11-14 03:26	< 1 min	0.0252244	0.0252242	0.0000001
MERCURY	2016-05-19 14:60	< 1 min	0.0156964	0.0156959	0.0000002
EARTH	2019-11-22 10:25	< 1 s	0.0737001	0.0736997	0.0000001
EARTH	2021-11-29 06:03	< 1 min	0.0411249	0.0411238	0.0000004
EARTH	2023-12-24 09:25	< 1 min	0.0947602	0.0947596	0.0000002
EARTH	2026-01-14 20:59	< 1 min	0.0957980	0.0957942	0.0000013
MERCURY	2026-04-08 15:59	2.3	0.0147797	0.0147750	0.0000015
EARTH	2028-01-17 20:42	< 1 min	0.1829037	0.1828774	0.0000088
MERCURY	2036-02-14 14:29	12.1	0.0136819	0.0136798	0.0000008
VENUS	2042-03-03 16:21	4.1	0.0274456	0.0273210	0.0000420
MERCURY	2043-05-22 15:49	19.4	0.0226754	0.0223502	0.0001086
EARTH	2044-11-21 22:29	1.7	0.1189072	0.1185627	0.0001149
MERCURY	2045-12-26 07:27	25.4	0.0278173	0.0273945	0.0001413
EARTH	2046-11-25 12:32	16.1	0.0109291	0.0105819	0.0001157
EARTH	2048-12-21 21:12	52.4	0.0934554	0.0934252	0.0000101
VENUS	2049-03-08 09:38	18.9	0.0444326	0.0441684	0.0000905
EARTH	2051-01-16 01:37	31.1	0.1008817	0.1003660	0.0001748
MERCURY	2053-03-18 16:36	193.7	0.0224282	0.0199292	0.0008646
MERCURY	2060-06-06 02:26	262.3	0.0496689	0.0419146	0.0026043
MERCURY	2065-01-24 07:12	434.9	0.0241344	0.0164260	0.0027003
EARTH	2067-11-22 20:29	68.1	0.0436344	0.0371442	0.0021636
EARTH	2069-12-08 10:20	491.1	0.0744206	0.0720056	0.0008065
EARTH	2072-01-08 10:45	242.1	0.0928707	0.0927732	0.0000403
MERCURY	2072-04-17 09:22	156.3	0.0353365	0.0315010	0.0012846
EARTH	2074-01-17 14:49	9.1	0.1523929	0.1515180	0.0002921
MERCURY	2079-07-09 05:44	261.2	0.0322398	0.0260775	0.0020777
VENUS	2080-12-04 23:50	112.0	0.0309131	0.0266825	0.0016335
MERCURY	2086-09-30 11:43	503.2	0.0481300	0.0318509	0.0054784
EARTH	2088-11-23 00:41	133.0	0.1756792	0.1625806	0.0043664
MERCURY	2089-05-02 14:09	733.3	0.0357093	0.0202743	0.0055026
EARTH	2090-11-23 13:36	289.3	0.0174252	0.0048551	0.0041908
EARTH	2092-12-09 16:25	164.7	0.0786335	0.0783151	0.0001063
EARTH	2095-01-06 08:37	1340.2	0.0949596	0.0937664	0.0006025
MERCURY	2096-08-10 01:54	> 1 d	0.0100571	0.0098676	0.0019663
EARTH	2097-01-17 18:59	72.9	0.1258216	0.1075213	0.0071629
VENUS	2100-01-01 05:40	1252.5	0.0441780	0.0234947	0.0232372
MERCURY	2106-06-27 10:42	> 1 d	0.0109338	0.0097456	0.0144535
MERCURY	2109-01-31 23:15	> 1 d	0.0387021	0.0128826	0.0482398
VENUS	2109-03-23 16:10	> 1 d	0.0407105	0.0234515	0.0401836
EARTH	2115-11-23 19:01	681.9	0.1139642	0.0032394	0.0432937
VENUS	2116-03-29 18:47	> 1 d	0.0419192	0.0414627	0.0083523
MERCURY	2116-05-13 04:39	> 1 w	0.0148977	0.0095308	0.0383373
EARTH	2117-11-26 10:47	> 1 d	0.0131206	0.0008548	0.0413733
MERCURY	2118-12-16 19:33	174.8	0.0469713	0.0209947	0.0090076
EARTH	2119-12-22 17:30	> 1 d	0.0942011	0.0932840	0.0010549
EARTH	2122-01-16 14:02	> 1 d	0.0982735	0.0946050	0.0247735

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