| Parameter |
Value |
| Designation |
C/2011 O1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-08-18T11:17:58.580160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:53Z |
| Obs used |
281 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
9.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-08-30.0000000 |
| e |
0.99678430 |
| q (au) |
3.890653 |
| a (au) |
1209.894503 |
| i (deg) |
76.498886 |
| Ω (om, deg) |
89.816812 |
| ω (w, deg) |
232.382598 |
| M (ma, deg) |
0.000270 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.327 + 2.712\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.327 |
| n |
2.712 |
| gf |
0.981 |
| gb |
-0.775 |
| 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 |
06:06:07.06 |
+32:27:55.3 |
HIP 28974 |
14.32 |
| 2026-06-01 12:00 |
06:06:11.51 |
+32:27:57.0 |
HIP 28974 |
13.69 |
| 2026-06-02 00:00 |
06:06:15.97 |
+32:27:58.7 |
HIP 28974 |
13.09 |
| 2026-06-02 12:00 |
06:06:20.45 |
+32:28:00.6 |
HIP 28974 |
12.54 |
| 2026-06-03 00:00 |
06:06:24.93 |
+32:28:02.5 |
HIP 28974 |
12.03 |
| 2026-06-03 12:00 |
06:06:29.43 |
+32:28:04.4 |
HIP 28974 |
11.57 |
| 2026-06-04 00:00 |
06:06:33.94 |
+32:28:06.4 |
HIP 28974 |
11.18 |
| 2026-06-04 12:00 |
06:06:38.46 |
+32:28:08.5 |
HIP 28974 |
10.85 |
| 2026-06-05 00:00 |
06:06:42.99 |
+32:28:10.6 |
HIP 28974 |
10.60 |
| 2026-06-05 12:00 |
06:06:47.54 |
+32:28:12.8 |
HIP 28974 |
10.43 |
| 2026-06-06 00:00 |
06:06:52.09 |
+32:28:15.1 |
HIP 28974 |
10.34 |
| 2026-06-06 12:00 |
06:06:56.65 |
+32:28:17.4 |
HIP 28974 |
10.34 |
| 2026-06-07 00:00 |
06:07:01.23 |
+32:28:19.8 |
HIP 28974 |
10.43 |
| 2026-06-07 12:00 |
06:07:05.81 |
+32:28:22.2 |
HIP 28974 |
10.60 |
| 2026-06-08 00:00 |
06:07:10.40 |
+32:28:24.8 |
HIP 28974 |
10.86 |
| 2026-06-08 12:00 |
06:07:15.00 |
+32:28:27.3 |
HIP 28974 |
11.20 |
| 2026-06-09 00:00 |
06:07:19.61 |
+32:28:30.0 |
HIP 28974 |
11.61 |
| 2026-06-09 12:00 |
06:07:24.23 |
+32:28:32.7 |
HIP 28974 |
12.08 |
| 2026-06-10 00:00 |
06:07:28.85 |
+32:28:35.4 |
HIP 28974 |
12.61 |
| 2026-06-10 12:00 |
06:07:33.48 |
+32:28:38.2 |
HIP 28974 |
13.19 |
| 2026-06-11 00:00 |
06:07:38.13 |
+32:28:41.1 |
HIP 28974 |
13.82 |
| 2026-06-11 12:00 |
06:07:42.77 |
+32:28:44.1 |
HIP 28974 |
14.49 |
| 2026-06-12 00:00 |
06:07:47.43 |
+32:28:47.1 |
HIP 28974 |
15.19 |
| 2026-06-12 12:00 |
06:07:52.09 |
+32:28:50.2 |
HIP 28974 |
15.92 |
| 2026-06-13 00:00 |
06:07:56.76 |
+32:28:53.3 |
HIP 28974 |
16.68 |
| 2026-06-13 12:00 |
06:08:01.43 |
+32:28:56.5 |
HIP 28974 |
17.46 |
| 2026-06-14 00:00 |
06:08:06.11 |
+32:28:59.8 |
HIP 28974 |
18.26 |
| 2026-06-14 12:00 |
06:08:10.80 |
+32:29:03.1 |
HIP 28974 |
19.08 |
| 2026-06-15 00:00 |
06:08:15.49 |
+32:29:06.5 |
HIP 28974 |
19.91 |
| 2026-06-15 12:00 |
06:08:20.19 |
+32:29:10.0 |
HIP 28974 |
20.76 |
| 2026-06-16 00:00 |
06:08:24.89 |
+32:29:13.5 |
HIP 28974 |
21.62 |
| 2026-06-16 12:00 |
06:08:29.59 |
+32:29:17.1 |
HIP 28974 |
22.50 |
| 2026-06-17 00:00 |
06:08:34.30 |
+32:29:20.8 |
HIP 28974 |
23.38 |
| 2026-06-17 12:00 |
06:08:39.01 |
+32:29:24.5 |
HIP 28974 |
24.27 |
| 2026-06-18 00:00 |
06:08:43.72 |
+32:29:28.3 |
HIP 28974 |
25.17 |
| 2026-06-18 12:00 |
06:08:48.44 |
+32:29:32.1 |
HIP 28974 |
26.08 |
| 2026-06-19 00:00 |
06:08:53.16 |
+32:29:36.1 |
HIP 28974 |
26.99 |
| 2026-06-19 12:00 |
06:08:57.88 |
+32:29:40.0 |
HIP 28974 |
27.91 |
| 2026-06-20 00:00 |
06:09:02.61 |
+32:29:44.1 |
HIP 28974 |
28.83 |
| 2026-06-20 12:00 |
06:09:07.33 |
+32:29:48.2 |
HIP 28974 |
29.76 |
| 2026-06-21 00:00 |
06:09:12.06 |
+32:29:52.4 |
HIP 28974 |
30.69 |
| 2026-06-21 12:00 |
06:09:16.79 |
+32:29:56.7 |
HIP 28974 |
31.63 |
| 2026-06-22 00:00 |
06:09:21.51 |
+32:30:01.0 |
HIP 29302 |
31.72 |