| Parameter |
Value |
| Designation |
C/2010 FB87 (WISE-Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-11-07T09:21:42.255360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:41Z |
| Obs used |
613 |
| NEO |
- |
| M1 |
11.100 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-05-28.0000000 |
| e |
0.99050085 |
| q (au) |
2.842763 |
| a (au) |
299.264939 |
| i (deg) |
107.625358 |
| Ω (om, deg) |
89.902192 |
| ω (w, deg) |
265.025840 |
| M (ma, deg) |
0.038382 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.840 + 3.477\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.840 |
| n |
3.477 |
| gf |
1.000 |
| gb |
-0.812 |
| 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) |
| 2026-06-01 00:00 |
03:22:16.28 |
+67:21:51.5 |
HIP 15852 |
12.51 |
| 2026-06-01 12:00 |
03:22:24.35 |
+67:22:14.7 |
HIP 15852 |
11.65 |
| 2026-06-02 00:00 |
03:22:32.39 |
+67:22:38.2 |
HIP 15852 |
10.78 |
| 2026-06-02 12:00 |
03:22:40.41 |
+67:23:02.0 |
HIP 15852 |
9.91 |
| 2026-06-03 00:00 |
03:22:48.41 |
+67:23:26.1 |
HIP 15852 |
9.04 |
| 2026-06-03 12:00 |
03:22:56.39 |
+67:23:50.5 |
HIP 15852 |
8.18 |
| 2026-06-04 00:00 |
03:23:04.35 |
+67:24:15.1 |
HIP 15852 |
7.31 |
| 2026-06-04 12:00 |
03:23:12.29 |
+67:24:39.9 |
HIP 15852 |
6.44 |
| 2026-06-05 00:00 |
03:23:20.21 |
+67:25:05.1 |
HIP 15852 |
5.58 |
| 2026-06-05 12:00 |
03:23:28.10 |
+67:25:30.5 |
HIP 15852 |
4.71 |
| 2026-06-06 00:00 |
03:23:35.97 |
+67:25:56.2 |
HIP 15852 |
3.85 |
| 2026-06-06 12:00 |
03:23:43.82 |
+67:26:22.1 |
HIP 15852 |
2.99 |
| 2026-06-07 00:00 |
03:23:51.64 |
+67:26:48.3 |
HIP 15852 |
2.14 |
| 2026-06-07 12:00 |
03:23:59.44 |
+67:27:14.8 |
HIP 15852 |
1.32 |
| 2026-06-08 00:00 |
03:24:07.21 |
+67:27:41.5 |
HIP 15852 |
0.64 |
| 2026-06-08 12:00 |
03:24:14.95 |
+67:28:08.5 |
HIP 15852 |
0.77 |
| 2026-06-09 00:00 |
03:24:22.67 |
+67:28:35.8 |
HIP 15855 |
1.49 |
| 2026-06-09 12:00 |
03:24:30.37 |
+67:29:03.3 |
HIP 15855 |
2.29 |
| 2026-06-10 00:00 |
03:24:38.03 |
+67:29:31.1 |
HIP 15855 |
3.13 |
| 2026-06-10 12:00 |
03:24:45.67 |
+67:29:59.1 |
HIP 15855 |
3.98 |
| 2026-06-11 00:00 |
03:24:53.28 |
+67:30:27.3 |
HIP 15855 |
4.84 |
| 2026-06-11 12:00 |
03:25:00.86 |
+67:30:55.9 |
HIP 15855 |
5.70 |
| 2026-06-12 00:00 |
03:25:08.41 |
+67:31:24.6 |
HIP 15855 |
6.56 |
| 2026-06-12 12:00 |
03:25:15.93 |
+67:31:53.7 |
HIP 15855 |
7.43 |
| 2026-06-13 00:00 |
03:25:23.42 |
+67:32:22.9 |
HIP 15855 |
8.29 |
| 2026-06-13 12:00 |
03:25:30.88 |
+67:32:52.4 |
HIP 15855 |
9.15 |
| 2026-06-14 00:00 |
03:25:38.31 |
+67:33:22.2 |
HIP 15855 |
10.02 |
| 2026-06-14 12:00 |
03:25:45.70 |
+67:33:52.2 |
HIP 15855 |
10.88 |
| 2026-06-15 00:00 |
03:25:53.07 |
+67:34:22.5 |
HIP 15855 |
11.75 |
| 2026-06-15 12:00 |
03:26:00.40 |
+67:34:52.9 |
HIP 15855 |
12.61 |
| 2026-06-16 00:00 |
03:26:07.69 |
+67:35:23.7 |
HIP 15855 |
13.48 |
| 2026-06-16 12:00 |
03:26:14.95 |
+67:35:54.6 |
HIP 15855 |
14.34 |
| 2026-06-17 00:00 |
03:26:22.18 |
+67:36:25.8 |
HIP 15855 |
15.20 |
| 2026-06-17 12:00 |
03:26:29.37 |
+67:36:57.2 |
HIP 15855 |
16.06 |
| 2026-06-18 00:00 |
03:26:36.52 |
+67:37:28.9 |
HIP 15855 |
16.92 |
| 2026-06-18 12:00 |
03:26:43.64 |
+67:38:00.8 |
HIP 15855 |
17.79 |
| 2026-06-19 00:00 |
03:26:50.72 |
+67:38:32.9 |
HIP 15855 |
18.64 |
| 2026-06-19 12:00 |
03:26:57.77 |
+67:39:05.2 |
HIP 15855 |
19.50 |
| 2026-06-20 00:00 |
03:27:04.77 |
+67:39:37.8 |
HIP 15855 |
20.36 |
| 2026-06-20 12:00 |
03:27:11.74 |
+67:40:10.6 |
HIP 15855 |
21.22 |
| 2026-06-21 00:00 |
03:27:18.67 |
+67:40:43.6 |
HIP 15855 |
22.08 |
| 2026-06-21 12:00 |
03:27:25.56 |
+67:41:16.8 |
HIP 15855 |
22.93 |
| 2026-06-22 00:00 |
03:27:32.41 |
+67:41:50.2 |
HIP 15855 |
23.79 |