| Parameter |
Value |
| Designation |
C/2000 U5 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-03-13T14:08:55.055040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:08Z |
| Obs used |
288 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-12-17.0000000 |
| e |
1.00537571 |
| q (au) |
3.486197 |
| a (au) |
-648.509659 |
| i (deg) |
93.652917 |
| Ω (om, deg) |
65.294538 |
| ω (w, deg) |
299.022540 |
| M (ma, deg) |
0.016616 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.464 + 2.318\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.464 |
| n |
2.318 |
| gf |
1.000 |
| gb |
-0.824 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
18:59:14.24 |
+68:35:06.0 |
HIP 93095 |
8.66 |
| 2026-05-12 12:00 |
18:59:09.89 |
+68:35:34.3 |
HIP 93095 |
8.61 |
| 2026-05-13 00:00 |
18:59:05.50 |
+68:36:02.4 |
HIP 93095 |
8.60 |
| 2026-05-13 12:00 |
18:59:01.05 |
+68:36:30.3 |
HIP 93095 |
8.62 |
| 2026-05-14 00:00 |
18:58:56.56 |
+68:36:58.0 |
HIP 93095 |
8.69 |
| 2026-05-14 12:00 |
18:58:52.02 |
+68:37:25.5 |
HIP 93095 |
8.79 |
| 2026-05-15 00:00 |
18:58:47.43 |
+68:37:52.7 |
HIP 93095 |
8.93 |
| 2026-05-15 12:00 |
18:58:42.80 |
+68:38:19.8 |
HIP 93095 |
9.10 |
| 2026-05-16 00:00 |
18:58:38.11 |
+68:38:46.6 |
HIP 93095 |
9.31 |
| 2026-05-16 12:00 |
18:58:33.38 |
+68:39:13.2 |
HIP 93095 |
9.54 |
| 2026-05-17 00:00 |
18:58:28.61 |
+68:39:39.6 |
HIP 93095 |
9.81 |
| 2026-05-17 12:00 |
18:58:23.79 |
+68:40:05.8 |
HIP 93095 |
10.10 |
| 2026-05-18 00:00 |
18:58:18.92 |
+68:40:31.7 |
HIP 93095 |
10.42 |
| 2026-05-18 12:00 |
18:58:14.00 |
+68:40:57.4 |
HIP 93095 |
10.75 |
| 2026-05-19 00:00 |
18:58:09.05 |
+68:41:22.9 |
HIP 93095 |
11.11 |
| 2026-05-19 12:00 |
18:58:04.04 |
+68:41:48.1 |
HIP 93095 |
11.49 |
| 2026-05-20 00:00 |
18:57:59.00 |
+68:42:13.1 |
HIP 93095 |
11.88 |
| 2026-05-20 12:00 |
18:57:53.91 |
+68:42:37.9 |
HIP 93095 |
12.29 |
| 2026-05-21 00:00 |
18:57:48.77 |
+68:43:02.4 |
HIP 93095 |
12.71 |
| 2026-05-21 12:00 |
18:57:43.60 |
+68:43:26.7 |
HIP 93095 |
13.14 |
| 2026-05-22 00:00 |
18:57:38.38 |
+68:43:50.7 |
HIP 93095 |
13.59 |
| 2026-05-22 12:00 |
18:57:33.12 |
+68:44:14.5 |
HIP 93095 |
14.04 |
| 2026-05-23 00:00 |
18:57:27.81 |
+68:44:38.1 |
HIP 93095 |
14.51 |
| 2026-05-23 12:00 |
18:57:22.47 |
+68:45:01.3 |
HIP 93095 |
14.98 |
| 2026-05-24 00:00 |
18:57:17.08 |
+68:45:24.4 |
HIP 93095 |
15.46 |
| 2026-05-24 12:00 |
18:57:11.66 |
+68:45:47.2 |
HIP 93095 |
15.94 |
| 2026-05-25 00:00 |
18:57:06.19 |
+68:46:09.7 |
HIP 93095 |
16.43 |
| 2026-05-25 12:00 |
18:57:00.69 |
+68:46:32.0 |
HIP 93095 |
16.93 |
| 2026-05-26 00:00 |
18:56:55.14 |
+68:46:54.0 |
HIP 93095 |
17.43 |
| 2026-05-26 12:00 |
18:56:49.56 |
+68:47:15.8 |
HIP 93095 |
17.94 |
| 2026-05-27 00:00 |
18:56:43.94 |
+68:47:37.3 |
HIP 93095 |
18.45 |
| 2026-05-27 12:00 |
18:56:38.28 |
+68:47:58.5 |
HIP 93095 |
18.97 |
| 2026-05-28 00:00 |
18:56:32.58 |
+68:48:19.5 |
HIP 93095 |
19.49 |
| 2026-05-28 12:00 |
18:56:26.85 |
+68:48:40.2 |
HIP 93095 |
20.01 |
| 2026-05-29 00:00 |
18:56:21.08 |
+68:49:00.6 |
HIP 93095 |
20.53 |
| 2026-05-29 12:00 |
18:56:15.27 |
+68:49:20.8 |
HIP 93095 |
21.06 |
| 2026-05-30 00:00 |
18:56:09.43 |
+68:49:40.7 |
HIP 93095 |
21.59 |
| 2026-05-30 12:00 |
18:56:03.55 |
+68:50:00.3 |
HIP 93095 |
22.12 |
| 2026-05-31 00:00 |
18:55:57.64 |
+68:50:19.7 |
HIP 93095 |
22.66 |
| 2026-05-31 12:00 |
18:55:51.69 |
+68:50:38.7 |
HIP 93095 |
23.20 |
| 2026-06-01 00:00 |
18:55:45.71 |
+68:50:57.5 |
HIP 93095 |
23.73 |
| 2026-06-01 12:00 |
18:55:39.69 |
+68:51:16.0 |
HIP 93095 |
24.27 |
| 2026-06-02 00:00 |
18:55:33.64 |
+68:51:34.3 |
HIP 93095 |
24.82 |