471P/LINEAR-Lemmon
| Parameter |
Value |
| Designation |
471P/LINEAR-Lemmon |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-12-20T07:38:00.384000Z |
| Orbit solution date (soln_date, UTC) |
2025-02-28T13:42:36Z |
| Obs used |
911 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
16.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2010-12-31T07:04:42.816000Z |
| Discovery magnitude (MPC) |
19.40 |
| Discovery observatory (MPC) |
704 · Lincoln Laboratory ETS, New Mexico |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-07-24.0000000 |
| e |
0.62777839 |
| q (au) |
2.123265 |
| a (au) |
5.704303 |
| i (deg) |
4.790901 |
| Ω (om, deg) |
283.347061 |
| ω (w, deg) |
94.964365 |
| M (ma, deg) |
349.197793 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.726 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.726 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.893 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2023-05-24 |
2023-07-28 |
+10.4044 |
-3.520 |
| 2023-07-28 |
2023-12-18 |
+2.8020 |
-0.914 |
| 2023-12-22 |
2025-02-27 |
-10.3387 |
+2.991 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
10:08:28.77 |
+07:06:34.4 |
HIP 49704 |
24.01 |
| 2026-02-03 12:00 |
10:08:13.39 |
+07:07:46.2 |
HIP 49704 |
26.19 |
| 2026-02-04 00:00 |
10:07:57.95 |
+07:08:58.6 |
HIP 49519 |
24.75 |
| 2026-02-04 12:00 |
10:07:42.46 |
+07:10:11.5 |
HIP 49519 |
22.60 |
| 2026-02-05 00:00 |
10:07:26.91 |
+07:11:24.9 |
HIP 49519 |
21.02 |
| 2026-02-05 12:00 |
10:07:11.31 |
+07:12:38.8 |
HIP 49519 |
20.13 |
| 2026-02-06 00:00 |
10:06:55.66 |
+07:13:53.1 |
HIP 49519 |
20.05 |
| 2026-02-06 12:00 |
10:06:39.97 |
+07:15:07.9 |
HIP 49519 |
20.80 |
| 2026-02-07 00:00 |
10:06:24.23 |
+07:16:23.1 |
HIP 49519 |
22.29 |
| 2026-02-07 12:00 |
10:06:08.45 |
+07:17:38.7 |
HIP 49519 |
24.39 |
| 2026-02-08 00:00 |
10:05:52.63 |
+07:18:54.8 |
HIP 49519 |
26.97 |
| 2026-02-08 12:00 |
10:05:36.78 |
+07:20:11.3 |
HIP 49316 |
25.89 |
| 2026-02-09 00:00 |
10:05:20.89 |
+07:21:28.1 |
HIP 49316 |
22.86 |
| 2026-02-09 12:00 |
10:05:04.97 |
+07:22:45.3 |
HIP 49316 |
20.23 |
| 2026-02-10 00:00 |
10:04:49.02 |
+07:24:02.9 |
HIP 49316 |
18.18 |
| 2026-02-10 12:00 |
10:04:33.05 |
+07:25:20.8 |
HIP 49316 |
16.92 |
| 2026-02-11 00:00 |
10:04:17.05 |
+07:26:39.1 |
HIP 49316 |
16.64 |
| 2026-02-11 12:00 |
10:04:01.03 |
+07:27:57.7 |
HIP 49316 |
17.39 |
| 2026-02-12 00:00 |
10:03:44.99 |
+07:29:16.6 |
HIP 49316 |
19.06 |
| 2026-02-12 12:00 |
10:03:28.93 |
+07:30:35.8 |
HIP 49316 |
21.44 |
| 2026-02-13 00:00 |
10:03:12.86 |
+07:31:55.2 |
HIP 49316 |
24.32 |
| 2026-02-13 12:00 |
10:02:56.78 |
+07:33:15.0 |
HIP 49316 |
27.54 |
| 2026-02-14 00:00 |
10:02:40.69 |
+07:34:35.0 |
HIP 49100 |
30.25 |
| 2026-02-14 12:00 |
10:02:24.60 |
+07:35:55.2 |
HIP 49100 |
28.72 |
| 2026-02-15 00:00 |
10:02:08.50 |
+07:37:15.6 |
HIP 49100 |
27.76 |
| 2026-02-15 12:00 |
10:01:52.40 |
+07:38:36.3 |
HIP 49100 |
27.42 |
| 2026-02-16 00:00 |
10:01:36.30 |
+07:39:57.1 |
HIP 49100 |
27.73 |
| 2026-02-16 12:00 |
10:01:20.21 |
+07:41:18.2 |
HIP 49029 |
27.10 |
| 2026-02-17 00:00 |
10:01:04.12 |
+07:42:39.4 |
HIP 49029 |
23.69 |
| 2026-02-17 12:00 |
10:00:48.04 |
+07:44:00.7 |
HIP 49029 |
20.58 |
| 2026-02-18 00:00 |
10:00:31.98 |
+07:45:22.2 |
HIP 49029 |
17.93 |
| 2026-02-18 12:00 |
10:00:15.93 |
+07:46:43.8 |
HIP 49029 |
15.95 |
| 2026-02-19 00:00 |
09:59:59.90 |
+07:48:05.5 |
HIP 49029 |
14.91 |
| 2026-02-19 12:00 |
09:59:43.89 |
+07:49:27.3 |
HIP 49029 |
15.02 |
| 2026-02-20 00:00 |
09:59:27.90 |
+07:50:49.2 |
HIP 49029 |
16.24 |
| 2026-02-20 12:00 |
09:59:11.94 |
+07:52:11.1 |
HIP 49029 |
18.35 |
| 2026-02-21 00:00 |
09:58:56.00 |
+07:53:33.1 |
HIP 49029 |
21.09 |
| 2026-02-21 12:00 |
09:58:40.10 |
+07:54:55.2 |
HIP 49029 |
24.23 |
| 2026-02-22 00:00 |
09:58:24.23 |
+07:56:17.2 |
HIP 48876 |
22.93 |
| 2026-02-22 12:00 |
09:58:08.39 |
+07:57:39.3 |
HIP 48876 |
21.19 |
| 2026-02-23 00:00 |
09:57:52.60 |
+07:59:01.3 |
HIP 48876 |
20.17 |
| 2026-02-23 12:00 |
09:57:36.84 |
+08:00:23.3 |
HIP 48876 |
19.96 |
| 2026-02-24 00:00 |
09:57:21.13 |
+08:01:45.3 |
HIP 48876 |
20.60 |