Ceto and Phorcus (65489 2003 FX128)
System parameters
| Heliocentric orbit | Photometry |
Position 2024/10/17 00:28 UTC |
| DES class = CENTAURR |
HV = 6.59±0.07 |
+16:01:44.10 +00:04:54.9 |
| <a> = 100.97 (AU) |
V = 23.0 (V2 = 24.1) |
Uncertainty = 0.1 (arcsec) |
| <e> = 0.824 |
Δmag = 0.58 |
Rates: +2.979, -1.214 ("/hr) |
| <i> = 21.45 (degrees) |
B-V = 0.87±0.02 |
|
| Perihelion = 1989 |
V-R = 0.55±0.02 |
Opposition: May |
| Aphelion = 2487 |
|
|
Astrometric observations
| Observation time (UTC) | Observatory/Instrument | RA | DEC |
Δ (AU) | Δx (arcsec) |
Δx error | Δy (arcsec) |
Δy error |
| 2006/04/11 21.69100 |
HST/ACS-HRC |
+14:03:13.20 |
+02:19:31.9 |
26.78465 |
+0.01724 |
0.00190 |
+0.08325 |
0.00330 |
| 2006/05/06 07.44700 |
HST/ACS-HRC |
+14:00:37.70 |
+02:36:30.2 |
26.88112 |
-0.04752 |
0.00240 |
-0.06871 |
0.00140 |
| 2006/05/10 04.51000 |
HST/ACS-HRC |
+14:00:14.00 |
+02:38:35.3 |
26.91192 |
-0.00321 |
0.00130 |
+0.08600 |
0.00170 |
| 2006/05/30 00.21700 |
HST/ACS-HRC |
+13:58:26.00 |
+02:46:01.6 |
27.12867 |
+0.03622 |
0.00100 |
+0.07467 |
0.00110 |
| 2006/05/31 01.69200 |
HST/ACS-HRC |
+13:58:21.10 |
+02:46:15.8 |
27.14284 |
+0.08288 |
0.00170 |
+0.02949 |
0.00220 |
| 2010/07/03 19.44056 |
HST/WFC3-UVIS |
+14:35:14.20 |
+02:11:46.2 |
31.14259 |
-0.01605 |
0.00162 |
-0.06501 |
0.00361 |
Orbital knowledge
Comments: Orbit published here. Mirror ambiguity remains.
| Parameter |
Value |
Units |
| P period | 9.560±0.001 | days |
| a semimajor axis | 1850±40 | kilometers |
| e eccentricity | 0.008±0.008 | dimensionless |
Breaking the mirror ambiguity...
Last updated: 2024/10/17 00:28 UTC