C/2011 UF305 (LINEAR)
| Parameter |
Value |
| Designation |
C/2011 UF305 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-07-22T03:58:11.043840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:57Z |
| Obs used |
2274 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
15.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-09-24.0000000 |
| e |
1.00067410 |
| q (au) |
2.138212 |
| a (au) |
-3171.934164 |
| i (deg) |
93.960744 |
| Ω (om, deg) |
297.435869 |
| ω (w, deg) |
121.994483 |
| M (ma, deg) |
0.000352 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.016 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.016 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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) |
| 2026-02-03 00:00 |
05:06:22.63 |
-66:21:04.4 |
HIP 23820 |
18.51 |
| 2026-02-03 12:00 |
05:06:16.70 |
-66:20:17.6 |
HIP 23820 |
17.95 |
| 2026-02-04 00:00 |
05:06:10.85 |
-66:19:30.6 |
HIP 23820 |
17.42 |
| 2026-02-04 12:00 |
05:06:05.07 |
-66:18:43.2 |
HIP 23820 |
16.92 |
| 2026-02-05 00:00 |
05:05:59.38 |
-66:17:55.5 |
HIP 23820 |
16.45 |
| 2026-02-05 12:00 |
05:05:53.76 |
-66:17:07.6 |
HIP 23820 |
16.03 |
| 2026-02-06 00:00 |
05:05:48.23 |
-66:16:19.4 |
HIP 23820 |
15.65 |
| 2026-02-06 12:00 |
05:05:42.78 |
-66:15:30.9 |
HIP 23820 |
15.31 |
| 2026-02-07 00:00 |
05:05:37.40 |
-66:14:42.1 |
HIP 23820 |
15.02 |
| 2026-02-07 12:00 |
05:05:32.11 |
-66:13:53.1 |
HIP 23820 |
14.78 |
| 2026-02-08 00:00 |
05:05:26.90 |
-66:13:03.8 |
HIP 23820 |
14.59 |
| 2026-02-08 12:00 |
05:05:21.78 |
-66:12:14.3 |
HIP 23820 |
14.46 |
| 2026-02-09 00:00 |
05:05:16.73 |
-66:11:24.5 |
HIP 23820 |
14.38 |
| 2026-02-09 12:00 |
05:05:11.77 |
-66:10:34.4 |
HIP 23820 |
14.36 |
| 2026-02-10 00:00 |
05:05:06.89 |
-66:09:44.2 |
HIP 23820 |
14.40 |
| 2026-02-10 12:00 |
05:05:02.09 |
-66:08:53.7 |
HIP 23820 |
14.50 |
| 2026-02-11 00:00 |
05:04:57.37 |
-66:08:02.9 |
HIP 23820 |
14.65 |
| 2026-02-11 12:00 |
05:04:52.74 |
-66:07:12.0 |
HIP 23820 |
14.85 |
| 2026-02-12 00:00 |
05:04:48.19 |
-66:06:20.8 |
HIP 23820 |
15.11 |
| 2026-02-12 12:00 |
05:04:43.73 |
-66:05:29.3 |
HIP 23820 |
15.41 |
| 2026-02-13 00:00 |
05:04:39.35 |
-66:04:37.7 |
HIP 23820 |
15.76 |
| 2026-02-13 12:00 |
05:04:35.05 |
-66:03:45.9 |
HIP 23820 |
16.15 |
| 2026-02-14 00:00 |
05:04:30.84 |
-66:02:53.9 |
HIP 23820 |
16.58 |
| 2026-02-14 12:00 |
05:04:26.71 |
-66:02:01.6 |
HIP 23820 |
17.05 |
| 2026-02-15 00:00 |
05:04:22.67 |
-66:01:09.2 |
HIP 23820 |
17.55 |
| 2026-02-15 12:00 |
05:04:18.71 |
-66:00:16.6 |
HIP 23820 |
18.08 |
| 2026-02-16 00:00 |
05:04:14.84 |
-65:59:23.8 |
HIP 23820 |
18.63 |
| 2026-02-16 12:00 |
05:04:11.05 |
-65:58:30.8 |
HIP 23820 |
19.22 |
| 2026-02-17 00:00 |
05:04:07.35 |
-65:57:37.6 |
HIP 23820 |
19.82 |
| 2026-02-17 12:00 |
05:04:03.73 |
-65:56:44.3 |
HIP 23342 |
20.20 |
| 2026-02-18 00:00 |
05:04:00.20 |
-65:55:50.8 |
HIP 23342 |
19.44 |
| 2026-02-18 12:00 |
05:03:56.76 |
-65:54:57.2 |
HIP 23342 |
18.70 |
| 2026-02-19 00:00 |
05:03:53.39 |
-65:54:03.4 |
HIP 23342 |
17.99 |
| 2026-02-19 12:00 |
05:03:50.12 |
-65:53:09.4 |
HIP 23342 |
17.31 |
| 2026-02-20 00:00 |
05:03:46.93 |
-65:52:15.3 |
HIP 23342 |
16.66 |
| 2026-02-20 12:00 |
05:03:43.83 |
-65:51:21.1 |
HIP 23342 |
16.05 |
| 2026-02-21 00:00 |
05:03:40.81 |
-65:50:26.7 |
HIP 23342 |
15.49 |
| 2026-02-21 12:00 |
05:03:37.88 |
-65:49:32.2 |
HIP 23342 |
14.97 |
| 2026-02-22 00:00 |
05:03:35.03 |
-65:48:37.6 |
HIP 23342 |
14.51 |
| 2026-02-22 12:00 |
05:03:32.27 |
-65:47:42.8 |
HIP 23342 |
14.10 |
| 2026-02-23 00:00 |
05:03:29.60 |
-65:46:48.0 |
HIP 23342 |
13.76 |
| 2026-02-23 12:00 |
05:03:27.01 |
-65:45:53.0 |
HIP 23342 |
13.48 |
| 2026-02-24 00:00 |
05:03:24.50 |
-65:44:58.0 |
HIP 23342 |
13.27 |