277P/LINEAR
| Parameter |
Value |
| Designation |
277P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-06-04T19:48:10.031040Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:43:01Z |
| Obs used |
828 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
19.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-09-16.0000000 |
| e |
0.50379346 |
| q (au) |
1.914197 |
| a (au) |
3.857662 |
| i (deg) |
16.748332 |
| Ω (om, deg) |
276.352145 |
| ω (w, deg) |
152.176271 |
| M (ma, deg) |
155.991309 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.075 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.075 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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) |
| 2026-02-03 00:00 |
18:43:22.05 |
-23:40:11.7 |
HIP 91993 |
22.61 |
| 2026-02-03 12:00 |
18:43:46.55 |
-23:39:20.9 |
HIP 91993 |
16.95 |
| 2026-02-04 00:00 |
18:44:10.98 |
-23:38:29.8 |
HIP 91993 |
11.33 |
| 2026-02-04 12:00 |
18:44:35.34 |
-23:37:38.6 |
HIP 91993 |
5.78 |
| 2026-02-05 00:00 |
18:44:59.65 |
-23:36:47.1 |
HIP 91993 |
1.52 |
| 2026-02-05 12:00 |
18:45:23.88 |
-23:35:55.5 |
HIP 91993 |
5.87 |
| 2026-02-06 00:00 |
18:45:48.05 |
-23:35:03.7 |
HIP 91993 |
11.38 |
| 2026-02-06 12:00 |
18:46:12.15 |
-23:34:11.6 |
HIP 91993 |
16.93 |
| 2026-02-07 00:00 |
18:46:36.18 |
-23:33:19.4 |
HIP 91993 |
22.49 |
| 2026-02-07 12:00 |
18:47:00.15 |
-23:32:27.0 |
HIP 92240 |
21.23 |
| 2026-02-08 00:00 |
18:47:24.04 |
-23:31:34.4 |
HIP 92240 |
17.68 |
| 2026-02-08 12:00 |
18:47:47.86 |
-23:30:41.6 |
HIP 92240 |
15.36 |
| 2026-02-09 00:00 |
18:48:11.60 |
-23:29:48.6 |
HIP 92240 |
14.85 |
| 2026-02-09 12:00 |
18:48:35.28 |
-23:28:55.4 |
HIP 92240 |
16.30 |
| 2026-02-10 00:00 |
18:48:58.88 |
-23:28:02.1 |
HIP 92240 |
19.26 |
| 2026-02-10 12:00 |
18:49:22.40 |
-23:27:08.6 |
HIP 92240 |
23.14 |
| 2026-02-11 00:00 |
18:49:45.85 |
-23:26:14.9 |
HIP 92403 |
23.91 |
| 2026-02-11 12:00 |
18:50:09.22 |
-23:25:21.0 |
HIP 92403 |
25.23 |
| 2026-02-12 00:00 |
18:50:32.52 |
-23:24:27.0 |
HIP 92503 |
22.71 |
| 2026-02-12 12:00 |
18:50:55.73 |
-23:23:32.8 |
HIP 92503 |
20.60 |
| 2026-02-13 00:00 |
18:51:18.87 |
-23:22:38.4 |
HIP 92503 |
19.77 |
| 2026-02-13 12:00 |
18:51:41.92 |
-23:21:43.9 |
HIP 92685 |
20.28 |
| 2026-02-14 00:00 |
18:52:04.89 |
-23:20:49.2 |
HIP 92685 |
15.06 |
| 2026-02-14 12:00 |
18:52:27.78 |
-23:19:54.4 |
HIP 92685 |
9.98 |
| 2026-02-15 00:00 |
18:52:50.58 |
-23:18:59.4 |
HIP 92685 |
5.45 |
| 2026-02-15 12:00 |
18:53:13.30 |
-23:18:04.2 |
HIP 92685 |
4.01 |
| 2026-02-16 00:00 |
18:53:35.94 |
-23:17:08.9 |
HIP 92685 |
7.64 |
| 2026-02-16 12:00 |
18:53:58.49 |
-23:16:13.5 |
HIP 92685 |
12.49 |
| 2026-02-17 00:00 |
18:54:20.94 |
-23:15:17.9 |
HIP 92685 |
17.56 |
| 2026-02-17 12:00 |
18:54:43.31 |
-23:14:22.1 |
HIP 92931 |
18.21 |
| 2026-02-18 00:00 |
18:55:05.60 |
-23:13:26.3 |
HIP 92931 |
13.01 |
| 2026-02-18 12:00 |
18:55:27.79 |
-23:12:30.3 |
HIP 92931 |
7.84 |
| 2026-02-19 00:00 |
18:55:49.88 |
-23:11:34.1 |
HIP 92931 |
2.73 |
| 2026-02-19 12:00 |
18:56:11.89 |
-23:10:37.9 |
HIP 92931 |
2.59 |
| 2026-02-20 00:00 |
18:56:33.80 |
-23:09:41.5 |
HIP 92980 |
0.79 |
| 2026-02-20 12:00 |
18:56:55.62 |
-23:08:45.0 |
HIP 92980 |
4.95 |
| 2026-02-21 00:00 |
18:57:17.34 |
-23:07:48.4 |
HIP 92980 |
10.00 |
| 2026-02-21 12:00 |
18:57:38.96 |
-23:06:51.6 |
HIP 92980 |
15.06 |
| 2026-02-22 00:00 |
18:58:00.49 |
-23:05:54.8 |
HIP 92980 |
20.09 |
| 2026-02-22 12:00 |
18:58:21.92 |
-23:04:57.8 |
HIP 93239 |
19.04 |
| 2026-02-23 00:00 |
18:58:43.25 |
-23:04:00.7 |
HIP 93239 |
16.00 |
| 2026-02-23 12:00 |
18:59:04.48 |
-23:03:03.5 |
HIP 93288 |
13.75 |
| 2026-02-24 00:00 |
18:59:25.61 |
-23:02:06.3 |
HIP 93288 |
9.03 |