| Parameter |
Value |
| Designation |
C/2001 U6 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-08-08T15:49:53.086080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:11Z |
| Obs used |
110 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
12.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-03-25.0000000 |
| e |
0.99616717 |
| q (au) |
4.406416 |
| a (au) |
1149.649515 |
| i (deg) |
107.255502 |
| Ω (om, deg) |
115.230514 |
| ω (w, deg) |
85.715141 |
| M (ma, deg) |
359.996545 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.267 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.267 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.998 |
| k |
1.000 |
| 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) |
| 2026-06-01 00:00 |
19:01:16.66 |
-69:31:48.8 |
HIP 93281 |
25.67 |
| 2026-06-01 12:00 |
19:01:09.90 |
-69:32:11.3 |
HIP 93281 |
25.16 |
| 2026-06-02 00:00 |
19:01:03.11 |
-69:32:33.5 |
HIP 93281 |
24.66 |
| 2026-06-02 12:00 |
19:00:56.28 |
-69:32:55.5 |
HIP 93281 |
24.18 |
| 2026-06-03 00:00 |
19:00:49.40 |
-69:33:17.3 |
HIP 93281 |
23.71 |
| 2026-06-03 12:00 |
19:00:42.49 |
-69:33:38.8 |
HIP 93281 |
23.26 |
| 2026-06-04 00:00 |
19:00:35.53 |
-69:34:00.1 |
HIP 93281 |
22.82 |
| 2026-06-04 12:00 |
19:00:28.54 |
-69:34:21.3 |
HIP 93281 |
22.40 |
| 2026-06-05 00:00 |
19:00:21.51 |
-69:34:42.1 |
HIP 93281 |
22.00 |
| 2026-06-05 12:00 |
19:00:14.44 |
-69:35:02.8 |
HIP 93281 |
21.61 |
| 2026-06-06 00:00 |
19:00:07.34 |
-69:35:23.2 |
HIP 93281 |
21.25 |
| 2026-06-06 12:00 |
19:00:00.20 |
-69:35:43.4 |
HIP 93281 |
20.90 |
| 2026-06-07 00:00 |
18:59:53.02 |
-69:36:03.4 |
HIP 93281 |
20.58 |
| 2026-06-07 12:00 |
18:59:45.80 |
-69:36:23.1 |
HIP 93281 |
20.28 |
| 2026-06-08 00:00 |
18:59:38.55 |
-69:36:42.6 |
HIP 93281 |
20.01 |
| 2026-06-08 12:00 |
18:59:31.27 |
-69:37:01.8 |
HIP 93281 |
19.76 |
| 2026-06-09 00:00 |
18:59:23.95 |
-69:37:20.8 |
HIP 93281 |
19.54 |
| 2026-06-09 12:00 |
18:59:16.60 |
-69:37:39.6 |
HIP 93281 |
19.35 |
| 2026-06-10 00:00 |
18:59:09.21 |
-69:37:58.1 |
HIP 92923 |
19.17 |
| 2026-06-10 12:00 |
18:59:01.79 |
-69:38:16.4 |
HIP 92923 |
18.46 |
| 2026-06-11 00:00 |
18:58:54.34 |
-69:38:34.5 |
HIP 92923 |
17.75 |
| 2026-06-11 12:00 |
18:58:46.86 |
-69:38:52.3 |
HIP 92923 |
17.04 |
| 2026-06-12 00:00 |
18:58:39.35 |
-69:39:09.8 |
HIP 92923 |
16.33 |
| 2026-06-12 12:00 |
18:58:31.81 |
-69:39:27.1 |
HIP 92923 |
15.61 |
| 2026-06-13 00:00 |
18:58:24.24 |
-69:39:44.1 |
HIP 92923 |
14.90 |
| 2026-06-13 12:00 |
18:58:16.64 |
-69:40:00.9 |
HIP 92923 |
14.19 |
| 2026-06-14 00:00 |
18:58:09.01 |
-69:40:17.5 |
HIP 92923 |
13.48 |
| 2026-06-14 12:00 |
18:58:01.36 |
-69:40:33.7 |
HIP 92923 |
12.78 |
| 2026-06-15 00:00 |
18:57:53.68 |
-69:40:49.8 |
HIP 92923 |
12.07 |
| 2026-06-15 12:00 |
18:57:45.97 |
-69:41:05.5 |
HIP 92923 |
11.37 |
| 2026-06-16 00:00 |
18:57:38.24 |
-69:41:21.0 |
HIP 92923 |
10.66 |
| 2026-06-16 12:00 |
18:57:30.48 |
-69:41:36.3 |
HIP 92923 |
9.97 |
| 2026-06-17 00:00 |
18:57:22.69 |
-69:41:51.3 |
HIP 92923 |
9.27 |
| 2026-06-17 12:00 |
18:57:14.89 |
-69:42:06.0 |
HIP 92923 |
8.58 |
| 2026-06-18 00:00 |
18:57:07.06 |
-69:42:20.4 |
HIP 92923 |
7.90 |
| 2026-06-18 12:00 |
18:56:59.21 |
-69:42:34.6 |
HIP 92923 |
7.23 |
| 2026-06-19 00:00 |
18:56:51.34 |
-69:42:48.5 |
HIP 92923 |
6.56 |
| 2026-06-19 12:00 |
18:56:43.45 |
-69:43:02.2 |
HIP 92923 |
5.92 |
| 2026-06-20 00:00 |
18:56:35.53 |
-69:43:15.6 |
HIP 92923 |
5.29 |
| 2026-06-20 12:00 |
18:56:27.60 |
-69:43:28.7 |
HIP 92923 |
4.70 |
| 2026-06-21 00:00 |
18:56:19.65 |
-69:43:41.6 |
HIP 92923 |
4.15 |
| 2026-06-21 12:00 |
18:56:11.68 |
-69:43:54.2 |
HIP 92923 |
3.66 |
| 2026-06-22 00:00 |
18:56:03.70 |
-69:44:06.5 |
HIP 92923 |
3.26 |