메타데이터
| 항목 |
값 |
| Designation |
C/2012 L1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-12-25T09:55:40.889280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:10Z |
| Obs used |
1489 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
8.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-11-20.0000000 |
| e |
0.99705290 |
| q (au) |
2.262410 |
| a (au) |
767.674452 |
| i (deg) |
87.219166 |
| Ω (om, deg) |
271.766875 |
| ω (w, deg) |
140.289327 |
| M (ma, deg) |
359.998359 |
밝기
산란 + 전체 선형
$$
M_a = (12.971 + 4.294\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.971 |
| n |
4.294 |
| gf |
0.998 |
| gb |
-0.847 |
| k |
0.800 |
| 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 |
| 2012-06-01 |
2012-09-11 |
+7.1051 |
-3.451 |
| 2012-09-11 |
2012-12-24 |
-1.1140 |
-0.355 |
| 2012-12-26 |
2013-07-08 |
+4.6516 |
-1.625 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
06:28:33.50 |
-83:29:02.9 |
HIP 30523 |
21.64 |
| 2026-05-12 12:00 |
06:28:58.39 |
-83:28:25.4 |
HIP 30523 |
22.44 |
| 2026-05-13 00:00 |
06:29:23.42 |
-83:27:48.1 |
HIP 30523 |
23.25 |
| 2026-05-13 12:00 |
06:29:48.58 |
-83:27:11.1 |
HIP 30523 |
24.06 |
| 2026-05-14 00:00 |
06:30:13.88 |
-83:26:34.3 |
HIP 30523 |
24.88 |
| 2026-05-14 12:00 |
06:30:39.30 |
-83:25:57.9 |
HIP 30523 |
25.70 |
| 2026-05-15 00:00 |
06:31:04.85 |
-83:25:21.7 |
HIP 30523 |
26.53 |
| 2026-05-15 12:00 |
06:31:30.53 |
-83:24:45.8 |
HIP 30523 |
27.37 |
| 2026-05-16 00:00 |
06:31:56.34 |
-83:24:10.1 |
HIP 30523 |
28.20 |
| 2026-05-16 12:00 |
06:32:22.27 |
-83:23:34.7 |
HIP 30523 |
29.05 |
| 2026-05-17 00:00 |
06:32:48.32 |
-83:22:59.6 |
HIP 30523 |
29.89 |
| 2026-05-17 12:00 |
06:33:14.49 |
-83:22:24.8 |
HIP 30523 |
30.74 |
| 2026-05-18 00:00 |
06:33:40.78 |
-83:21:50.3 |
HIP 30523 |
31.59 |
| 2026-05-18 12:00 |
06:34:07.19 |
-83:21:16.1 |
HIP 30523 |
32.44 |
| 2026-05-19 00:00 |
06:34:33.71 |
-83:20:42.1 |
HIP 32351 |
33.00 |
| 2026-05-19 12:00 |
06:35:00.35 |
-83:20:08.4 |
HIP 32351 |
32.09 |
| 2026-05-20 00:00 |
06:35:27.09 |
-83:19:35.0 |
HIP 32351 |
31.18 |
| 2026-05-20 12:00 |
06:35:53.95 |
-83:19:01.9 |
HIP 32351 |
30.28 |
| 2026-05-21 00:00 |
06:36:20.92 |
-83:18:29.1 |
HIP 32351 |
29.39 |
| 2026-05-21 12:00 |
06:36:48.00 |
-83:17:56.6 |
HIP 32351 |
28.50 |
| 2026-05-22 00:00 |
06:37:15.18 |
-83:17:24.3 |
HIP 32351 |
27.62 |
| 2026-05-22 12:00 |
06:37:42.46 |
-83:16:52.4 |
HIP 32351 |
26.75 |
| 2026-05-23 00:00 |
06:38:09.85 |
-83:16:20.7 |
HIP 32351 |
25.89 |
| 2026-05-23 12:00 |
06:38:37.34 |
-83:15:49.3 |
HIP 32351 |
25.04 |
| 2026-05-24 00:00 |
06:39:04.92 |
-83:15:18.3 |
HIP 32351 |
24.20 |
| 2026-05-24 12:00 |
06:39:32.61 |
-83:14:47.5 |
HIP 32351 |
23.37 |
| 2026-05-25 00:00 |
06:40:00.39 |
-83:14:17.0 |
HIP 32351 |
22.56 |
| 2026-05-25 12:00 |
06:40:28.27 |
-83:13:46.8 |
HIP 32351 |
21.76 |
| 2026-05-26 00:00 |
06:40:56.24 |
-83:13:16.9 |
HIP 32351 |
20.98 |
| 2026-05-26 12:00 |
06:41:24.31 |
-83:12:47.4 |
HIP 32351 |
20.22 |
| 2026-05-27 00:00 |
06:41:52.47 |
-83:12:18.1 |
HIP 32351 |
19.49 |
| 2026-05-27 12:00 |
06:42:20.71 |
-83:11:49.1 |
HIP 32351 |
18.78 |
| 2026-05-28 00:00 |
06:42:49.05 |
-83:11:20.4 |
HIP 32351 |
18.10 |
| 2026-05-28 12:00 |
06:43:17.48 |
-83:10:52.0 |
HIP 32351 |
17.45 |
| 2026-05-29 00:00 |
06:43:45.99 |
-83:10:23.9 |
HIP 32351 |
16.84 |
| 2026-05-29 12:00 |
06:44:14.59 |
-83:09:56.1 |
HIP 32351 |
16.27 |
| 2026-05-30 00:00 |
06:44:43.27 |
-83:09:28.6 |
HIP 32351 |
15.75 |
| 2026-05-30 12:00 |
06:45:12.03 |
-83:09:01.4 |
HIP 32351 |
15.27 |
| 2026-05-31 00:00 |
06:45:40.88 |
-83:08:34.6 |
HIP 32351 |
14.85 |
| 2026-05-31 12:00 |
06:46:09.81 |
-83:08:08.0 |
HIP 32351 |
14.50 |
| 2026-06-01 00:00 |
06:46:38.82 |
-83:07:41.7 |
HIP 32351 |
14.20 |
| 2026-06-01 12:00 |
06:47:07.91 |
-83:07:15.7 |
HIP 32351 |
13.98 |
| 2026-06-02 00:00 |
06:47:37.07 |
-83:06:50.1 |
HIP 32351 |
13.83 |