| 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) |
| 2026-07-29 00:00 |
18:42:37.02 |
+68:51:46.4 |
HIP 92057 |
19.08 |
| 2026-07-29 12:00 |
18:42:30.67 |
+68:51:28.1 |
HIP 92057 |
19.48 |
| 2026-07-30 00:00 |
18:42:24.36 |
+68:51:09.5 |
HIP 92057 |
19.89 |
| 2026-07-30 12:00 |
18:42:18.07 |
+68:50:50.6 |
HIP 91429 |
19.48 |
| 2026-07-31 00:00 |
18:42:11.81 |
+68:50:31.4 |
HIP 91429 |
18.98 |
| 2026-07-31 12:00 |
18:42:05.58 |
+68:50:11.9 |
HIP 91429 |
18.50 |
| 2026-08-01 00:00 |
18:41:59.39 |
+68:49:52.1 |
HIP 91429 |
18.02 |
| 2026-08-01 12:00 |
18:41:53.22 |
+68:49:32.1 |
HIP 91429 |
17.57 |
| 2026-08-02 00:00 |
18:41:47.09 |
+68:49:11.7 |
HIP 91429 |
17.12 |
| 2026-08-02 12:00 |
18:41:40.99 |
+68:48:51.1 |
HIP 91429 |
16.70 |
| 2026-08-03 00:00 |
18:41:34.92 |
+68:48:30.1 |
HIP 91429 |
16.30 |
| 2026-08-03 12:00 |
18:41:28.88 |
+68:48:08.9 |
HIP 91429 |
15.91 |
| 2026-08-04 00:00 |
18:41:22.88 |
+68:47:47.5 |
HIP 91429 |
15.55 |
| 2026-08-04 12:00 |
18:41:16.91 |
+68:47:25.7 |
HIP 91429 |
15.21 |
| 2026-08-05 00:00 |
18:41:10.97 |
+68:47:03.6 |
HIP 91429 |
14.90 |
| 2026-08-05 12:00 |
18:41:05.07 |
+68:46:41.3 |
HIP 91429 |
14.61 |
| 2026-08-06 00:00 |
18:40:59.20 |
+68:46:18.7 |
HIP 91429 |
14.35 |
| 2026-08-06 12:00 |
18:40:53.37 |
+68:45:55.8 |
HIP 91429 |
14.12 |
| 2026-08-07 00:00 |
18:40:47.58 |
+68:45:32.7 |
HIP 91429 |
13.93 |
| 2026-08-07 12:00 |
18:40:41.82 |
+68:45:09.3 |
HIP 91429 |
13.76 |
| 2026-08-08 00:00 |
18:40:36.10 |
+68:44:45.6 |
HIP 91429 |
13.63 |
| 2026-08-08 12:00 |
18:40:30.42 |
+68:44:21.6 |
HIP 91429 |
13.54 |
| 2026-08-09 00:00 |
18:40:24.77 |
+68:43:57.4 |
HIP 91429 |
13.48 |
| 2026-08-09 12:00 |
18:40:19.16 |
+68:43:32.9 |
HIP 91429 |
13.46 |
| 2026-08-10 00:00 |
18:40:13.59 |
+68:43:08.2 |
HIP 91429 |
13.48 |
| 2026-08-10 12:00 |
18:40:08.06 |
+68:42:43.1 |
HIP 91429 |
13.53 |
| 2026-08-11 00:00 |
18:40:02.57 |
+68:42:17.9 |
HIP 91429 |
13.62 |
| 2026-08-11 12:00 |
18:39:57.12 |
+68:41:52.3 |
HIP 91429 |
13.75 |
| 2026-08-12 00:00 |
18:39:51.71 |
+68:41:26.5 |
HIP 91429 |
13.91 |
| 2026-08-12 12:00 |
18:39:46.34 |
+68:41:00.5 |
HIP 91429 |
14.10 |
| 2026-08-13 00:00 |
18:39:41.01 |
+68:40:34.2 |
HIP 91429 |
14.32 |
| 2026-08-13 12:00 |
18:39:35.73 |
+68:40:07.6 |
HIP 91429 |
14.58 |
| 2026-08-14 00:00 |
18:39:30.48 |
+68:39:40.8 |
HIP 91429 |
14.87 |
| 2026-08-14 12:00 |
18:39:25.28 |
+68:39:13.8 |
HIP 91429 |
15.18 |
| 2026-08-15 00:00 |
18:39:20.12 |
+68:38:46.5 |
HIP 91429 |
15.52 |
| 2026-08-15 12:00 |
18:39:15.01 |
+68:38:19.0 |
HIP 91429 |
15.88 |
| 2026-08-16 00:00 |
18:39:09.94 |
+68:37:51.2 |
HIP 91429 |
16.26 |
| 2026-08-16 12:00 |
18:39:04.91 |
+68:37:23.2 |
HIP 91429 |
16.67 |
| 2026-08-17 00:00 |
18:38:59.93 |
+68:36:55.0 |
HIP 91429 |
17.10 |
| 2026-08-17 12:00 |
18:38:54.99 |
+68:36:26.5 |
HIP 91429 |
17.54 |
| 2026-08-18 00:00 |
18:38:50.10 |
+68:35:57.8 |
HIP 91429 |
18.00 |
| 2026-08-18 12:00 |
18:38:45.25 |
+68:35:28.9 |
HIP 91429 |
18.47 |
| 2026-08-19 00:00 |
18:38:40.45 |
+68:34:59.7 |
HIP 91429 |
18.96 |