메타데이터
| 항목 |
값 |
| Designation |
146P/Shoemaker-LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-08-05T08:53:48.851520Z |
| Orbit solution date (soln_date, UTC) |
2025-05-09T00:50:37Z |
| Obs used |
660 |
| NEO |
- |
| M1 |
12.200 |
| K1 |
21.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-04-07.0000000 |
| e |
0.64733427 |
| q (au) |
1.421549 |
| a (au) |
4.030867 |
| i (deg) |
23.109042 |
| Ω (om, deg) |
53.379790 |
| ω (w, deg) |
316.990390 |
| M (ma, deg) |
256.312817 |
밝기
산란 + 전체 선형
$$
M_a = (12.467 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.467 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2024-05-06 |
2024-08-05 |
+10.3090 |
-2.699 |
| 2024-08-06 |
2024-10-12 |
+42.9787 |
-7.408 |
| 2024-10-12 |
2025-05-01 |
-11.2690 |
+3.718 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
11:02:18.24 |
+26:52:06.6 |
HIP 53850 |
23.94 |
| 2026-07-29 12:00 |
11:02:39.53 |
+26:49:03.9 |
HIP 54169 |
29.38 |
| 2026-07-30 00:00 |
11:03:00.86 |
+26:46:01.4 |
HIP 54169 |
24.66 |
| 2026-07-30 12:00 |
11:03:22.23 |
+26:42:59.2 |
HIP 54169 |
20.40 |
| 2026-07-31 00:00 |
11:03:43.65 |
+26:39:57.3 |
HIP 54169 |
16.97 |
| 2026-07-31 12:00 |
11:04:05.11 |
+26:36:55.6 |
HIP 54169 |
14.94 |
| 2026-08-01 00:00 |
11:04:26.61 |
+26:33:54.2 |
HIP 54169 |
14.92 |
| 2026-08-01 12:00 |
11:04:48.16 |
+26:30:53.1 |
HIP 54169 |
16.92 |
| 2026-08-02 00:00 |
11:05:09.74 |
+26:27:52.2 |
HIP 54169 |
20.35 |
| 2026-08-02 12:00 |
11:05:31.37 |
+26:24:51.6 |
HIP 54169 |
24.63 |
| 2026-08-03 00:00 |
11:05:53.03 |
+26:21:51.3 |
HIP 54169 |
29.40 |
| 2026-08-03 12:00 |
11:06:14.74 |
+26:18:51.3 |
HIP 54169 |
34.46 |
| 2026-08-04 00:00 |
11:06:36.48 |
+26:15:51.5 |
HIP 54341 |
32.39 |
| 2026-08-04 12:00 |
11:06:58.26 |
+26:12:52.1 |
HIP 54341 |
29.04 |
| 2026-08-05 00:00 |
11:07:20.08 |
+26:09:52.9 |
HIP 54341 |
26.52 |
| 2026-08-05 12:00 |
11:07:41.93 |
+26:06:54.0 |
HIP 54341 |
25.10 |
| 2026-08-06 00:00 |
11:08:03.82 |
+26:03:55.4 |
HIP 54341 |
24.97 |
| 2026-08-06 12:00 |
11:08:25.75 |
+26:00:57.1 |
HIP 54341 |
26.14 |
| 2026-08-07 00:00 |
11:08:47.71 |
+25:57:59.1 |
HIP 54341 |
28.47 |
| 2026-08-07 12:00 |
11:09:09.70 |
+25:55:01.4 |
HIP 54648 |
27.36 |
| 2026-08-08 00:00 |
11:09:31.73 |
+25:52:04.1 |
HIP 54648 |
23.67 |
| 2026-08-08 12:00 |
11:09:53.79 |
+25:49:07.0 |
HIP 54648 |
20.92 |
| 2026-08-09 00:00 |
11:10:15.89 |
+25:46:10.3 |
HIP 54648 |
19.53 |
| 2026-08-09 12:00 |
11:10:38.01 |
+25:43:13.8 |
HIP 54648 |
19.78 |
| 2026-08-10 00:00 |
11:11:00.17 |
+25:40:17.7 |
HIP 54648 |
21.62 |
| 2026-08-10 12:00 |
11:11:22.36 |
+25:37:22.0 |
HIP 54648 |
24.71 |
| 2026-08-11 00:00 |
11:11:44.58 |
+25:34:26.5 |
HIP 54648 |
28.65 |
| 2026-08-11 12:00 |
11:12:06.83 |
+25:31:31.4 |
HIP 54615 |
30.88 |
| 2026-08-12 00:00 |
11:12:29.10 |
+25:28:36.6 |
HIP 54845 |
27.68 |
| 2026-08-12 12:00 |
11:12:51.40 |
+25:25:42.2 |
HIP 54845 |
22.48 |
| 2026-08-13 00:00 |
11:13:13.73 |
+25:22:48.2 |
HIP 54845 |
17.68 |
| 2026-08-13 12:00 |
11:13:36.09 |
+25:19:54.5 |
HIP 54845 |
13.70 |
| 2026-08-14 00:00 |
11:13:58.47 |
+25:17:01.1 |
HIP 54845 |
11.45 |
| 2026-08-14 12:00 |
11:14:20.88 |
+25:14:08.1 |
HIP 54845 |
11.93 |
| 2026-08-15 00:00 |
11:14:43.31 |
+25:11:15.5 |
HIP 54845 |
14.90 |
| 2026-08-15 12:00 |
11:15:05.76 |
+25:08:23.2 |
HIP 54845 |
19.24 |
| 2026-08-16 00:00 |
11:15:28.24 |
+25:05:31.4 |
HIP 54845 |
24.23 |
| 2026-08-16 12:00 |
11:15:50.74 |
+25:02:39.9 |
HIP 55171 |
26.05 |
| 2026-08-17 00:00 |
11:16:13.26 |
+24:59:48.8 |
HIP 55171 |
21.20 |
| 2026-08-17 12:00 |
11:16:35.80 |
+24:56:58.0 |
HIP 55171 |
16.99 |
| 2026-08-18 00:00 |
11:16:58.36 |
+24:54:07.7 |
HIP 55171 |
13.98 |
| 2026-08-18 12:00 |
11:17:20.94 |
+24:51:17.8 |
HIP 55171 |
13.06 |
| 2026-08-19 00:00 |
11:17:43.54 |
+24:48:28.2 |
HIP 55171 |
14.62 |