| Parameter |
Value |
| Designation |
C/2000 CT54 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-06-19T10:43:56.498880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
216 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-05-15.0000000 |
| e |
0.99835347 |
| q (au) |
3.155967 |
| a (au) |
1916.742283 |
| i (deg) |
49.212506 |
| Ω (om, deg) |
18.956792 |
| ω (w, deg) |
272.644443 |
| M (ma, deg) |
0.003871 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.408 + 3.965\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.408 |
| n |
3.965 |
| gf |
1.000 |
| gb |
-0.824 |
| k |
0.998 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
03:53:12.87 |
+62:54:17.9 |
HIP 18395 |
23.44 |
| 2026-07-29 12:00 |
03:53:15.33 |
+62:54:45.5 |
HIP 18395 |
22.94 |
| 2026-07-30 00:00 |
03:53:17.76 |
+62:55:13.2 |
HIP 18395 |
22.44 |
| 2026-07-30 12:00 |
03:53:20.14 |
+62:55:40.9 |
HIP 18395 |
21.95 |
| 2026-07-31 00:00 |
03:53:22.49 |
+62:56:08.6 |
HIP 18395 |
21.47 |
| 2026-07-31 12:00 |
03:53:24.79 |
+62:56:36.4 |
HIP 18395 |
20.99 |
| 2026-08-01 00:00 |
03:53:27.05 |
+62:57:04.3 |
HIP 18395 |
20.52 |
| 2026-08-01 12:00 |
03:53:29.27 |
+62:57:32.1 |
HIP 18395 |
20.05 |
| 2026-08-02 00:00 |
03:53:31.44 |
+62:58:00.0 |
HIP 18395 |
19.59 |
| 2026-08-02 12:00 |
03:53:33.58 |
+62:58:28.0 |
HIP 18395 |
19.14 |
| 2026-08-03 00:00 |
03:53:35.67 |
+62:58:56.0 |
HIP 18395 |
18.69 |
| 2026-08-03 12:00 |
03:53:37.73 |
+62:59:24.0 |
HIP 18395 |
18.26 |
| 2026-08-04 00:00 |
03:53:39.74 |
+62:59:52.0 |
HIP 18395 |
17.83 |
| 2026-08-04 12:00 |
03:53:41.70 |
+63:00:20.1 |
HIP 18395 |
17.41 |
| 2026-08-05 00:00 |
03:53:43.63 |
+63:00:48.2 |
HIP 18395 |
17.00 |
| 2026-08-05 12:00 |
03:53:45.51 |
+63:01:16.3 |
HIP 18395 |
16.60 |
| 2026-08-06 00:00 |
03:53:47.35 |
+63:01:44.5 |
HIP 18395 |
16.22 |
| 2026-08-06 12:00 |
03:53:49.14 |
+63:02:12.7 |
HIP 18395 |
15.84 |
| 2026-08-07 00:00 |
03:53:50.89 |
+63:02:40.9 |
HIP 18395 |
15.48 |
| 2026-08-07 12:00 |
03:53:52.60 |
+63:03:09.1 |
HIP 18395 |
15.13 |
| 2026-08-08 00:00 |
03:53:54.26 |
+63:03:37.3 |
HIP 18395 |
14.79 |
| 2026-08-08 12:00 |
03:53:55.88 |
+63:04:05.6 |
HIP 18395 |
14.47 |
| 2026-08-09 00:00 |
03:53:57.46 |
+63:04:33.9 |
HIP 18395 |
14.16 |
| 2026-08-09 12:00 |
03:53:58.99 |
+63:05:02.2 |
HIP 18395 |
13.87 |
| 2026-08-10 00:00 |
03:54:00.48 |
+63:05:30.4 |
HIP 18395 |
13.60 |
| 2026-08-10 12:00 |
03:54:01.92 |
+63:05:58.7 |
HIP 18395 |
13.35 |
| 2026-08-11 00:00 |
03:54:03.31 |
+63:06:27.1 |
HIP 18395 |
13.11 |
| 2026-08-11 12:00 |
03:54:04.66 |
+63:06:55.4 |
HIP 18395 |
12.90 |
| 2026-08-12 00:00 |
03:54:05.97 |
+63:07:23.7 |
HIP 18395 |
12.70 |
| 2026-08-12 12:00 |
03:54:07.23 |
+63:07:52.0 |
HIP 18395 |
12.53 |
| 2026-08-13 00:00 |
03:54:08.44 |
+63:08:20.3 |
HIP 18395 |
12.38 |
| 2026-08-13 12:00 |
03:54:09.61 |
+63:08:48.6 |
HIP 18395 |
12.26 |
| 2026-08-14 00:00 |
03:54:10.74 |
+63:09:16.9 |
HIP 18395 |
12.15 |
| 2026-08-14 12:00 |
03:54:11.81 |
+63:09:45.2 |
HIP 18395 |
12.07 |
| 2026-08-15 00:00 |
03:54:12.84 |
+63:10:13.5 |
HIP 18395 |
12.02 |
| 2026-08-15 12:00 |
03:54:13.83 |
+63:10:41.8 |
HIP 18395 |
11.99 |
| 2026-08-16 00:00 |
03:54:14.77 |
+63:11:10.1 |
HIP 18395 |
11.99 |
| 2026-08-16 12:00 |
03:54:15.66 |
+63:11:38.3 |
HIP 18395 |
12.00 |
| 2026-08-17 00:00 |
03:54:16.50 |
+63:12:06.6 |
HIP 18395 |
12.05 |
| 2026-08-17 12:00 |
03:54:17.30 |
+63:12:34.8 |
HIP 18395 |
12.12 |
| 2026-08-18 00:00 |
03:54:18.06 |
+63:13:03.0 |
HIP 18395 |
12.21 |
| 2026-08-18 12:00 |
03:54:18.76 |
+63:13:31.2 |
HIP 18406 |
12.22 |
| 2026-08-19 00:00 |
03:54:19.42 |
+63:13:59.3 |
HIP 18406 |
12.14 |