| 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 |
0.991 |
| gb |
-0.595 |
| 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) |
| 2026-05-12 00:00 |
06:03:22.43 |
+32:27:35.0 |
HIP 28644 |
12.05 |
| 2026-05-12 12:00 |
06:03:26.15 |
+32:27:34.5 |
HIP 28644 |
12.45 |
| 2026-05-13 00:00 |
06:03:29.90 |
+32:27:33.9 |
HIP 28644 |
12.89 |
| 2026-05-13 12:00 |
06:03:33.67 |
+32:27:33.4 |
HIP 28644 |
13.37 |
| 2026-05-14 00:00 |
06:03:37.46 |
+32:27:33.0 |
HIP 28644 |
13.87 |
| 2026-05-14 12:00 |
06:03:41.28 |
+32:27:32.7 |
HIP 28644 |
14.41 |
| 2026-05-15 00:00 |
06:03:45.12 |
+32:27:32.3 |
HIP 28644 |
14.97 |
| 2026-05-15 12:00 |
06:03:48.98 |
+32:27:32.1 |
HIP 28644 |
15.56 |
| 2026-05-16 00:00 |
06:03:52.86 |
+32:27:31.9 |
HIP 28644 |
16.17 |
| 2026-05-16 12:00 |
06:03:56.77 |
+32:27:31.7 |
HIP 28644 |
16.80 |
| 2026-05-17 00:00 |
06:04:00.70 |
+32:27:31.6 |
HIP 28644 |
17.44 |
| 2026-05-17 12:00 |
06:04:04.64 |
+32:27:31.6 |
HIP 28644 |
18.11 |
| 2026-05-18 00:00 |
06:04:08.61 |
+32:27:31.6 |
HIP 28644 |
18.79 |
| 2026-05-18 12:00 |
06:04:12.60 |
+32:27:31.6 |
HIP 28644 |
19.49 |
| 2026-05-19 00:00 |
06:04:16.61 |
+32:27:31.8 |
HIP 28644 |
20.20 |
| 2026-05-19 12:00 |
06:04:20.65 |
+32:27:31.9 |
HIP 28644 |
20.93 |
| 2026-05-20 00:00 |
06:04:24.70 |
+32:27:32.2 |
HIP 28644 |
21.67 |
| 2026-05-20 12:00 |
06:04:28.76 |
+32:27:32.5 |
HIP 28644 |
22.42 |
| 2026-05-21 00:00 |
06:04:32.85 |
+32:27:32.8 |
HIP 28644 |
23.18 |
| 2026-05-21 12:00 |
06:04:36.96 |
+32:27:33.2 |
HIP 28644 |
23.95 |
| 2026-05-22 00:00 |
06:04:41.09 |
+32:27:33.7 |
HIP 28644 |
24.72 |
| 2026-05-22 12:00 |
06:04:45.23 |
+32:27:34.2 |
HIP 28644 |
25.51 |
| 2026-05-23 00:00 |
06:04:49.39 |
+32:27:34.8 |
HIP 28644 |
26.31 |
| 2026-05-23 12:00 |
06:04:53.57 |
+32:27:35.4 |
HIP 28644 |
27.11 |
| 2026-05-24 00:00 |
06:04:57.77 |
+32:27:36.1 |
HIP 28974 |
26.53 |
| 2026-05-24 12:00 |
06:05:01.98 |
+32:27:36.9 |
HIP 28974 |
25.72 |
| 2026-05-25 00:00 |
06:05:06.22 |
+32:27:37.7 |
HIP 28974 |
24.91 |
| 2026-05-25 12:00 |
06:05:10.46 |
+32:27:38.6 |
HIP 28974 |
24.11 |
| 2026-05-26 00:00 |
06:05:14.73 |
+32:27:39.5 |
HIP 28974 |
23.30 |
| 2026-05-26 12:00 |
06:05:19.01 |
+32:27:40.5 |
HIP 28974 |
22.50 |
| 2026-05-27 00:00 |
06:05:23.30 |
+32:27:41.5 |
HIP 28974 |
21.70 |
| 2026-05-27 12:00 |
06:05:27.61 |
+32:27:42.6 |
HIP 28974 |
20.91 |
| 2026-05-28 00:00 |
06:05:31.94 |
+32:27:43.8 |
HIP 28974 |
20.13 |
| 2026-05-28 12:00 |
06:05:36.28 |
+32:27:45.0 |
HIP 28974 |
19.36 |
| 2026-05-29 00:00 |
06:05:40.64 |
+32:27:46.3 |
HIP 28974 |
18.59 |
| 2026-05-29 12:00 |
06:05:45.01 |
+32:27:47.6 |
HIP 28974 |
17.84 |
| 2026-05-30 00:00 |
06:05:49.39 |
+32:27:49.1 |
HIP 28974 |
17.09 |
| 2026-05-30 12:00 |
06:05:53.79 |
+32:27:50.5 |
HIP 28974 |
16.37 |
| 2026-05-31 00:00 |
06:05:58.20 |
+32:27:52.0 |
HIP 28974 |
15.66 |
| 2026-05-31 12:00 |
06:06:02.62 |
+32:27:53.6 |
HIP 28974 |
14.98 |
| 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 |