C/2000 U5 (LINEAR)
| 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) |
| 2026-02-03 00:00 |
18:56:12.37 |
+66:52:34.0 |
HIP 92745 |
19.62 |
| 2026-02-03 12:00 |
18:56:17.76 |
+66:52:52.1 |
HIP 92745 |
19.75 |
| 2026-02-04 00:00 |
18:56:23.12 |
+66:53:10.6 |
HIP 92745 |
19.89 |
| 2026-02-04 12:00 |
18:56:28.46 |
+66:53:29.3 |
HIP 92745 |
20.05 |
| 2026-02-05 00:00 |
18:56:33.76 |
+66:53:48.2 |
HIP 92745 |
20.21 |
| 2026-02-05 12:00 |
18:56:39.04 |
+66:54:07.5 |
HIP 92745 |
20.39 |
| 2026-02-06 00:00 |
18:56:44.29 |
+66:54:27.0 |
HIP 92745 |
20.58 |
| 2026-02-06 12:00 |
18:56:49.50 |
+66:54:46.8 |
HIP 92745 |
20.78 |
| 2026-02-07 00:00 |
18:56:54.69 |
+66:55:06.8 |
HIP 92745 |
20.99 |
| 2026-02-07 12:00 |
18:56:59.85 |
+66:55:27.2 |
HIP 92745 |
21.21 |
| 2026-02-08 00:00 |
18:57:04.97 |
+66:55:47.7 |
HIP 92745 |
21.44 |
| 2026-02-08 12:00 |
18:57:10.07 |
+66:56:08.6 |
HIP 92745 |
21.68 |
| 2026-02-09 00:00 |
18:57:15.13 |
+66:56:29.7 |
HIP 92745 |
21.93 |
| 2026-02-09 12:00 |
18:57:20.16 |
+66:56:51.0 |
HIP 92745 |
22.19 |
| 2026-02-10 00:00 |
18:57:25.16 |
+66:57:12.6 |
HIP 92745 |
22.45 |
| 2026-02-10 12:00 |
18:57:30.12 |
+66:57:34.5 |
HIP 92745 |
22.73 |
| 2026-02-11 00:00 |
18:57:35.06 |
+66:57:56.6 |
HIP 92745 |
23.01 |
| 2026-02-11 12:00 |
18:57:39.95 |
+66:58:19.0 |
HIP 92745 |
23.30 |
| 2026-02-12 00:00 |
18:57:44.82 |
+66:58:41.7 |
HIP 92745 |
23.60 |
| 2026-02-12 12:00 |
18:57:49.65 |
+66:59:04.5 |
HIP 92745 |
23.90 |
| 2026-02-13 00:00 |
18:57:54.45 |
+66:59:27.7 |
HIP 92745 |
24.21 |
| 2026-02-13 12:00 |
18:57:59.21 |
+66:59:51.0 |
HIP 92745 |
24.53 |
| 2026-02-14 00:00 |
18:58:03.93 |
+67:00:14.6 |
HIP 92745 |
24.85 |
| 2026-02-14 12:00 |
18:58:08.62 |
+67:00:38.5 |
HIP 92745 |
25.18 |
| 2026-02-15 00:00 |
18:58:13.28 |
+67:01:02.6 |
HIP 92745 |
25.51 |
| 2026-02-15 12:00 |
18:58:17.89 |
+67:01:26.9 |
HIP 92745 |
25.85 |
| 2026-02-16 00:00 |
18:58:22.47 |
+67:01:51.5 |
HIP 92745 |
26.19 |
| 2026-02-16 12:00 |
18:58:27.02 |
+67:02:16.3 |
HIP 92889 |
26.52 |
| 2026-02-17 00:00 |
18:58:31.52 |
+67:02:41.4 |
HIP 92889 |
26.48 |
| 2026-02-17 12:00 |
18:58:35.99 |
+67:03:06.6 |
HIP 92889 |
26.44 |
| 2026-02-18 00:00 |
18:58:40.42 |
+67:03:32.1 |
HIP 92889 |
26.42 |
| 2026-02-18 12:00 |
18:58:44.81 |
+67:03:57.9 |
HIP 92889 |
26.40 |
| 2026-02-19 00:00 |
18:58:49.16 |
+67:04:23.8 |
HIP 92889 |
26.39 |
| 2026-02-19 12:00 |
18:58:53.47 |
+67:04:50.0 |
HIP 92889 |
26.39 |
| 2026-02-20 00:00 |
18:58:57.74 |
+67:05:16.4 |
HIP 92889 |
26.39 |
| 2026-02-20 12:00 |
18:59:01.97 |
+67:05:43.0 |
HIP 92889 |
26.41 |
| 2026-02-21 00:00 |
18:59:06.16 |
+67:06:09.8 |
HIP 92889 |
26.43 |
| 2026-02-21 12:00 |
18:59:10.31 |
+67:06:36.8 |
HIP 92889 |
26.46 |
| 2026-02-22 00:00 |
18:59:14.42 |
+67:07:04.1 |
HIP 92889 |
26.50 |
| 2026-02-22 12:00 |
18:59:18.48 |
+67:07:31.5 |
HIP 92889 |
26.55 |
| 2026-02-23 00:00 |
18:59:22.51 |
+67:07:59.2 |
HIP 92889 |
26.60 |
| 2026-02-23 12:00 |
18:59:26.49 |
+67:08:27.1 |
HIP 92889 |
26.67 |
| 2026-02-24 00:00 |
18:59:30.43 |
+67:08:55.1 |
HIP 92889 |
26.74 |