267P/LONEOS
| Parameter |
Value |
| Designation |
267P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2006-09-02T22:24:46.506240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:10Z |
| Obs used |
197 |
| NEO |
- |
| M1 |
20.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-09-25.0000000 |
| e |
0.59338984 |
| q (au) |
1.337651 |
| a (au) |
3.289763 |
| i (deg) |
5.368342 |
| Ω (om, deg) |
245.248897 |
| ω (w, deg) |
96.855091 |
| M (ma, deg) |
63.935532 |
Magnitude
Scatter + Global Linear
$$
M_a = (19.505 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
19.505 |
| n |
6.000 |
| gf |
0.990 |
| gb |
-0.846 |
| k |
0.977 |
| δ90 |
9.895 |
| 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 |
09:27:51.61 |
+06:45:58.9 |
HIP 46447 |
16.48 |
| 2026-02-03 12:00 |
09:27:29.73 |
+06:47:40.6 |
HIP 46447 |
18.48 |
| 2026-02-04 00:00 |
09:27:07.83 |
+06:49:23.0 |
HIP 46306 |
19.30 |
| 2026-02-04 12:00 |
09:26:45.91 |
+06:51:06.0 |
HIP 46306 |
19.44 |
| 2026-02-05 00:00 |
09:26:23.97 |
+06:52:49.6 |
HIP 46306 |
21.20 |
| 2026-02-05 12:00 |
09:26:02.01 |
+06:54:33.8 |
HIP 46306 |
24.21 |
| 2026-02-06 00:00 |
09:25:40.05 |
+06:56:18.5 |
HIP 46306 |
28.10 |
| 2026-02-06 12:00 |
09:25:18.08 |
+06:58:03.8 |
HIP 46306 |
32.53 |
| 2026-02-07 00:00 |
09:24:56.11 |
+06:59:49.7 |
HIP 46306 |
37.33 |
| 2026-02-07 12:00 |
09:24:34.14 |
+07:01:36.1 |
HIP 46134 |
40.61 |
| 2026-02-08 00:00 |
09:24:12.18 |
+07:03:23.0 |
HIP 45943 |
37.69 |
| 2026-02-08 12:00 |
09:23:50.22 |
+07:05:10.4 |
HIP 45943 |
34.63 |
| 2026-02-09 00:00 |
09:23:28.28 |
+07:06:58.2 |
HIP 45943 |
32.31 |
| 2026-02-09 12:00 |
09:23:06.35 |
+07:08:46.5 |
HIP 45901 |
30.41 |
| 2026-02-10 00:00 |
09:22:44.45 |
+07:10:35.2 |
HIP 45901 |
27.64 |
| 2026-02-10 12:00 |
09:22:22.56 |
+07:12:24.3 |
HIP 45901 |
25.88 |
| 2026-02-11 00:00 |
09:22:00.71 |
+07:14:13.8 |
HIP 45901 |
25.32 |
| 2026-02-11 12:00 |
09:21:38.89 |
+07:16:03.7 |
HIP 45901 |
26.05 |
| 2026-02-12 00:00 |
09:21:17.10 |
+07:17:53.9 |
HIP 45901 |
27.96 |
| 2026-02-12 12:00 |
09:20:55.35 |
+07:19:44.5 |
HIP 45901 |
30.82 |
| 2026-02-13 00:00 |
09:20:33.64 |
+07:21:35.4 |
HIP 45901 |
34.40 |
| 2026-02-13 12:00 |
09:20:11.99 |
+07:23:26.5 |
HIP 45653 |
33.47 |
| 2026-02-14 00:00 |
09:19:50.38 |
+07:25:18.0 |
HIP 45653 |
30.47 |
| 2026-02-14 12:00 |
09:19:28.82 |
+07:27:09.6 |
HIP 45653 |
28.31 |
| 2026-02-15 00:00 |
09:19:07.33 |
+07:29:01.6 |
HIP 45653 |
27.19 |
| 2026-02-15 12:00 |
09:18:45.89 |
+07:30:53.7 |
HIP 45653 |
27.22 |
| 2026-02-16 00:00 |
09:18:24.52 |
+07:32:46.0 |
HIP 45613 |
25.41 |
| 2026-02-16 12:00 |
09:18:03.22 |
+07:34:38.5 |
HIP 45613 |
22.33 |
| 2026-02-17 00:00 |
09:17:42.00 |
+07:36:31.2 |
HIP 45613 |
20.36 |
| 2026-02-17 12:00 |
09:17:20.85 |
+07:38:24.0 |
HIP 45613 |
19.81 |
| 2026-02-18 00:00 |
09:16:59.78 |
+07:40:16.9 |
HIP 45613 |
20.78 |
| 2026-02-18 12:00 |
09:16:38.79 |
+07:42:09.8 |
HIP 45613 |
23.06 |
| 2026-02-19 00:00 |
09:16:17.89 |
+07:44:02.9 |
HIP 45613 |
26.30 |
| 2026-02-19 12:00 |
09:15:57.08 |
+07:45:56.0 |
HIP 45613 |
30.18 |
| 2026-02-20 00:00 |
09:15:36.37 |
+07:47:49.2 |
HIP 45282 |
30.19 |
| 2026-02-20 12:00 |
09:15:15.76 |
+07:49:42.3 |
HIP 45282 |
26.47 |
| 2026-02-21 00:00 |
09:14:55.24 |
+07:51:35.5 |
HIP 45282 |
23.45 |
| 2026-02-21 12:00 |
09:14:34.83 |
+07:53:28.6 |
HIP 45282 |
21.42 |
| 2026-02-22 00:00 |
09:14:14.53 |
+07:55:21.7 |
HIP 45282 |
20.65 |
| 2026-02-22 12:00 |
09:13:54.34 |
+07:57:14.7 |
HIP 45234 |
20.57 |
| 2026-02-23 00:00 |
09:13:34.27 |
+07:59:07.6 |
HIP 45234 |
16.49 |
| 2026-02-23 12:00 |
09:13:14.31 |
+08:01:00.5 |
HIP 45234 |
13.32 |
| 2026-02-24 00:00 |
09:12:54.48 |
+08:02:53.2 |
HIP 45234 |
11.77 |