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) |
| 2026-03-26 00:00 |
06:04:11.93 |
-84:43:12.1 |
HIP 29313 |
22.42 |
| 2026-03-26 12:00 |
06:04:14.81 |
-84:42:18.7 |
HIP 29313 |
23.22 |
| 2026-03-27 00:00 |
06:04:18.05 |
-84:41:25.3 |
HIP 29313 |
24.02 |
| 2026-03-27 12:00 |
06:04:21.64 |
-84:40:32.0 |
HIP 29313 |
24.83 |
| 2026-03-28 00:00 |
06:04:25.59 |
-84:39:38.7 |
HIP 29313 |
25.63 |
| 2026-03-28 12:00 |
06:04:29.89 |
-84:38:45.5 |
HIP 29313 |
26.44 |
| 2026-03-29 00:00 |
06:04:34.54 |
-84:37:52.3 |
HIP 29313 |
27.25 |
| 2026-03-29 12:00 |
06:04:39.53 |
-84:36:59.1 |
HIP 29313 |
28.07 |
| 2026-03-30 00:00 |
06:04:44.87 |
-84:36:06.1 |
HIP 29313 |
28.88 |
| 2026-03-30 12:00 |
06:04:50.53 |
-84:35:13.0 |
HIP 29313 |
29.70 |
| 2026-03-31 00:00 |
06:04:56.54 |
-84:34:20.1 |
HIP 29313 |
30.51 |
| 2026-03-31 12:00 |
06:05:02.87 |
-84:33:27.2 |
HIP 29313 |
31.33 |
| 2026-04-01 00:00 |
06:05:09.53 |
-84:32:34.4 |
HIP 29313 |
32.15 |
| 2026-04-01 12:00 |
06:05:16.52 |
-84:31:41.7 |
HIP 29313 |
32.97 |
| 2026-04-02 00:00 |
06:05:23.82 |
-84:30:49.0 |
HIP 29313 |
33.79 |
| 2026-04-02 12:00 |
06:05:31.44 |
-84:29:56.5 |
HIP 29313 |
34.61 |
| 2026-04-03 00:00 |
06:05:39.38 |
-84:29:04.0 |
HIP 29313 |
35.43 |
| 2026-04-03 12:00 |
06:05:47.63 |
-84:28:11.6 |
HIP 29313 |
36.25 |
| 2026-04-04 00:00 |
06:05:56.19 |
-84:27:19.3 |
HIP 29313 |
37.07 |
| 2026-04-04 12:00 |
06:06:05.06 |
-84:26:27.1 |
HIP 29313 |
37.90 |
| 2026-04-05 00:00 |
06:06:14.22 |
-84:25:35.0 |
HIP 29313 |
38.72 |
| 2026-04-05 12:00 |
06:06:23.69 |
-84:24:43.0 |
HIP 29313 |
39.54 |
| 2026-04-06 00:00 |
06:06:33.46 |
-84:23:51.1 |
HIP 29313 |
40.36 |
| 2026-04-06 12:00 |
06:06:43.52 |
-84:22:59.3 |
HIP 29313 |
41.19 |
| 2026-04-07 00:00 |
06:06:53.87 |
-84:22:07.6 |
HIP 29313 |
42.01 |
| 2026-04-07 12:00 |
06:07:04.51 |
-84:21:16.1 |
HIP 30523 |
41.78 |
| 2026-04-08 00:00 |
06:07:15.44 |
-84:20:24.6 |
HIP 30523 |
40.98 |
| 2026-04-08 12:00 |
06:07:26.65 |
-84:19:33.3 |
HIP 30523 |
40.17 |
| 2026-04-09 00:00 |
06:07:38.14 |
-84:18:42.1 |
HIP 30523 |
39.36 |
| 2026-04-09 12:00 |
06:07:49.91 |
-84:17:51.0 |
HIP 30523 |
38.56 |
| 2026-04-10 00:00 |
06:08:01.95 |
-84:17:00.0 |
HIP 30523 |
37.75 |
| 2026-04-10 12:00 |
06:08:14.27 |
-84:16:09.2 |
HIP 30523 |
36.94 |
| 2026-04-11 00:00 |
06:08:26.86 |
-84:15:18.5 |
HIP 30523 |
36.14 |
| 2026-04-11 12:00 |
06:08:39.72 |
-84:14:28.0 |
HIP 30523 |
35.33 |
| 2026-04-12 00:00 |
06:08:52.84 |
-84:13:37.6 |
HIP 30523 |
34.53 |
| 2026-04-12 12:00 |
06:09:06.23 |
-84:12:47.3 |
HIP 30523 |
33.72 |
| 2026-04-13 00:00 |
06:09:19.87 |
-84:11:57.2 |
HIP 30523 |
32.92 |
| 2026-04-13 12:00 |
06:09:33.77 |
-84:11:07.2 |
HIP 30523 |
32.11 |
| 2026-04-14 00:00 |
06:09:47.93 |
-84:10:17.4 |
HIP 30523 |
31.31 |
| 2026-04-14 12:00 |
06:10:02.34 |
-84:09:27.7 |
HIP 30523 |
30.51 |
| 2026-04-15 00:00 |
06:10:17.00 |
-84:08:38.2 |
HIP 30523 |
29.71 |
| 2026-04-15 12:00 |
06:10:31.91 |
-84:07:48.9 |
HIP 30523 |
28.91 |
| 2026-04-16 00:00 |
06:10:47.06 |
-84:06:59.7 |
HIP 30523 |
28.11 |