| Parameter |
Value |
| Designation |
C/2010 J1 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-02-04T19:40:22.028160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:43Z |
| Obs used |
605 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
15.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-05-23.0000000 |
| e |
0.95382789 |
| q (au) |
1.695658 |
| a (au) |
36.724723 |
| i (deg) |
134.384945 |
| Ω (om, deg) |
254.813387 |
| ω (w, deg) |
333.109117 |
| M (ma, deg) |
0.474658 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.987 + 5.711\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.987 |
| n |
5.711 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-03-26 00:00 |
07:58:02.35 |
+53:34:12.4 |
HIP 38780 |
19.12 |
| 2026-03-26 12:00 |
07:57:59.48 |
+53:33:45.4 |
HIP 38780 |
19.03 |
| 2026-03-27 00:00 |
07:57:56.68 |
+53:33:18.3 |
HIP 38780 |
18.98 |
| 2026-03-27 12:00 |
07:57:53.92 |
+53:32:51.0 |
HIP 38780 |
18.95 |
| 2026-03-28 00:00 |
07:57:51.22 |
+53:32:23.5 |
HIP 38780 |
18.95 |
| 2026-03-28 12:00 |
07:57:48.58 |
+53:31:55.9 |
HIP 38780 |
18.97 |
| 2026-03-29 00:00 |
07:57:45.99 |
+53:31:28.1 |
HIP 38780 |
19.03 |
| 2026-03-29 12:00 |
07:57:43.46 |
+53:31:00.1 |
HIP 38780 |
19.11 |
| 2026-03-30 00:00 |
07:57:40.98 |
+53:30:32.0 |
HIP 38780 |
19.21 |
| 2026-03-30 12:00 |
07:57:38.55 |
+53:30:03.8 |
HIP 38780 |
19.34 |
| 2026-03-31 00:00 |
07:57:36.18 |
+53:29:35.4 |
HIP 38780 |
19.49 |
| 2026-03-31 12:00 |
07:57:33.86 |
+53:29:06.8 |
HIP 38780 |
19.67 |
| 2026-04-01 00:00 |
07:57:31.60 |
+53:28:38.2 |
HIP 38780 |
19.87 |
| 2026-04-01 12:00 |
07:57:29.40 |
+53:28:09.3 |
HIP 38780 |
20.09 |
| 2026-04-02 00:00 |
07:57:27.24 |
+53:27:40.4 |
HIP 38780 |
20.33 |
| 2026-04-02 12:00 |
07:57:25.15 |
+53:27:11.3 |
HIP 38780 |
20.59 |
| 2026-04-03 00:00 |
07:57:23.11 |
+53:26:42.0 |
HIP 38780 |
20.87 |
| 2026-04-03 12:00 |
07:57:21.12 |
+53:26:12.6 |
HIP 38780 |
21.16 |
| 2026-04-04 00:00 |
07:57:19.19 |
+53:25:43.1 |
HIP 38780 |
21.48 |
| 2026-04-04 12:00 |
07:57:17.31 |
+53:25:13.5 |
HIP 38780 |
21.80 |
| 2026-04-05 00:00 |
07:57:15.49 |
+53:24:43.8 |
HIP 38780 |
22.15 |
| 2026-04-05 12:00 |
07:57:13.73 |
+53:24:13.9 |
HIP 38780 |
22.50 |
| 2026-04-06 00:00 |
07:57:12.01 |
+53:23:43.9 |
HIP 38780 |
22.87 |
| 2026-04-06 12:00 |
07:57:10.36 |
+53:23:13.8 |
HIP 38780 |
23.26 |
| 2026-04-07 00:00 |
07:57:08.76 |
+53:22:43.6 |
HIP 38780 |
23.65 |
| 2026-04-07 12:00 |
07:57:07.21 |
+53:22:13.2 |
HIP 38780 |
24.05 |
| 2026-04-08 00:00 |
07:57:05.72 |
+53:21:42.8 |
HIP 38780 |
24.47 |
| 2026-04-08 12:00 |
07:57:04.29 |
+53:21:12.2 |
HIP 39092 |
24.81 |
| 2026-04-09 00:00 |
07:57:02.91 |
+53:20:41.6 |
HIP 39092 |
25.05 |
| 2026-04-09 12:00 |
07:57:01.58 |
+53:20:10.8 |
HIP 39092 |
25.29 |
| 2026-04-10 00:00 |
07:57:00.31 |
+53:19:39.9 |
HIP 39092 |
25.53 |
| 2026-04-10 12:00 |
07:56:59.10 |
+53:19:09.0 |
HIP 39092 |
25.77 |
| 2026-04-11 00:00 |
07:56:57.94 |
+53:18:37.9 |
HIP 39092 |
26.01 |
| 2026-04-11 12:00 |
07:56:56.84 |
+53:18:06.7 |
HIP 39092 |
26.26 |
| 2026-04-12 00:00 |
07:56:55.79 |
+53:17:35.5 |
HIP 39092 |
26.50 |
| 2026-04-12 12:00 |
07:56:54.79 |
+53:17:04.1 |
HIP 38952 |
26.25 |
| 2026-04-13 00:00 |
07:56:53.86 |
+53:16:32.7 |
HIP 38952 |
25.84 |
| 2026-04-13 12:00 |
07:56:52.97 |
+53:16:01.2 |
HIP 38952 |
25.43 |
| 2026-04-14 00:00 |
07:56:52.14 |
+53:15:29.6 |
HIP 38952 |
25.02 |
| 2026-04-14 12:00 |
07:56:51.37 |
+53:14:57.9 |
HIP 38952 |
24.61 |
| 2026-04-15 00:00 |
07:56:50.65 |
+53:14:26.1 |
HIP 38952 |
24.20 |
| 2026-04-15 12:00 |
07:56:49.99 |
+53:13:54.3 |
HIP 38952 |
23.79 |
| 2026-04-16 00:00 |
07:56:49.38 |
+53:13:22.4 |
HIP 38952 |
23.39 |