메타데이터
| 항목 |
값 |
| Designation |
C/2012 X1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-02-21T15:12:12.525120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:29Z |
| Obs used |
2560 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
14.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-12-18.0000000 |
| e |
0.98957208 |
| q (au) |
1.598910 |
| a (au) |
153.329748 |
| i (deg) |
44.367326 |
| Ω (om, deg) |
113.146428 |
| ω (w, deg) |
132.113677 |
| M (ma, deg) |
359.965929 |
밝기
산란 + 전체 선형
$$
M_a = (7.004 + 5.465\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.004 |
| n |
5.465 |
| gf |
1.000 |
| gb |
-0.669 |
| k |
0.933 |
| 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 |
| 2012-12-08 |
2013-11-20 |
+5.9231 |
-3.732 |
| 2013-11-20 |
2014-02-20 |
+6.3519 |
-2.844 |
| 2014-02-22 |
2015-12-09 |
+1.6210 |
-2.089 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
03:40:27.50 |
-22:50:30.2 |
HIP 17350 |
32.89 |
| 2026-06-01 12:00 |
03:40:31.95 |
-22:50:27.3 |
HIP 17350 |
31.87 |
| 2026-06-02 00:00 |
03:40:36.40 |
-22:50:24.8 |
HIP 17350 |
30.87 |
| 2026-06-02 12:00 |
03:40:40.83 |
-22:50:22.6 |
HIP 17350 |
29.86 |
| 2026-06-03 00:00 |
03:40:45.26 |
-22:50:20.7 |
HIP 17350 |
28.86 |
| 2026-06-03 12:00 |
03:40:49.67 |
-22:50:19.3 |
HIP 17350 |
27.85 |
| 2026-06-04 00:00 |
03:40:54.08 |
-22:50:18.1 |
HIP 17350 |
26.85 |
| 2026-06-04 12:00 |
03:40:58.48 |
-22:50:17.4 |
HIP 17350 |
25.86 |
| 2026-06-05 00:00 |
03:41:02.87 |
-22:50:16.9 |
HIP 17350 |
24.86 |
| 2026-06-05 12:00 |
03:41:07.25 |
-22:50:16.9 |
HIP 17350 |
23.87 |
| 2026-06-06 00:00 |
03:41:11.62 |
-22:50:17.2 |
HIP 17350 |
22.88 |
| 2026-06-06 12:00 |
03:41:15.98 |
-22:50:17.8 |
HIP 17350 |
21.89 |
| 2026-06-07 00:00 |
03:41:20.32 |
-22:50:18.8 |
HIP 17350 |
20.91 |
| 2026-06-07 12:00 |
03:41:24.66 |
-22:50:20.1 |
HIP 17350 |
19.93 |
| 2026-06-08 00:00 |
03:41:28.99 |
-22:50:21.8 |
HIP 17350 |
18.95 |
| 2026-06-08 12:00 |
03:41:33.30 |
-22:50:23.9 |
HIP 17350 |
17.97 |
| 2026-06-09 00:00 |
03:41:37.60 |
-22:50:26.3 |
HIP 17350 |
17.00 |
| 2026-06-09 12:00 |
03:41:41.89 |
-22:50:29.0 |
HIP 17350 |
16.04 |
| 2026-06-10 00:00 |
03:41:46.17 |
-22:50:32.1 |
HIP 17350 |
15.07 |
| 2026-06-10 12:00 |
03:41:50.43 |
-22:50:35.6 |
HIP 17350 |
14.11 |
| 2026-06-11 00:00 |
03:41:54.69 |
-22:50:39.4 |
HIP 17350 |
13.16 |
| 2026-06-11 12:00 |
03:41:58.93 |
-22:50:43.5 |
HIP 17350 |
12.21 |
| 2026-06-12 00:00 |
03:42:03.15 |
-22:50:48.1 |
HIP 17350 |
11.26 |
| 2026-06-12 12:00 |
03:42:07.36 |
-22:50:52.9 |
HIP 17350 |
10.33 |
| 2026-06-13 00:00 |
03:42:11.56 |
-22:50:58.2 |
HIP 17350 |
9.40 |
| 2026-06-13 12:00 |
03:42:15.75 |
-22:51:03.7 |
HIP 17350 |
8.48 |
| 2026-06-14 00:00 |
03:42:19.92 |
-22:51:09.6 |
HIP 17350 |
7.57 |
| 2026-06-14 12:00 |
03:42:24.07 |
-22:51:15.9 |
HIP 17350 |
6.68 |
| 2026-06-15 00:00 |
03:42:28.21 |
-22:51:22.5 |
HIP 17350 |
5.81 |
| 2026-06-15 12:00 |
03:42:32.33 |
-22:51:29.5 |
HIP 17350 |
4.98 |
| 2026-06-16 00:00 |
03:42:36.44 |
-22:51:36.8 |
HIP 17350 |
4.20 |
| 2026-06-16 12:00 |
03:42:40.54 |
-22:51:44.5 |
HIP 17350 |
3.50 |
| 2026-06-17 00:00 |
03:42:44.61 |
-22:51:52.5 |
HIP 17350 |
2.94 |
| 2026-06-17 12:00 |
03:42:48.67 |
-22:52:00.9 |
HIP 17350 |
2.61 |
| 2026-06-18 00:00 |
03:42:52.72 |
-22:52:09.6 |
HIP 17350 |
2.60 |
| 2026-06-18 12:00 |
03:42:56.74 |
-22:52:18.7 |
HIP 17350 |
2.90 |
| 2026-06-19 00:00 |
03:43:00.75 |
-22:52:28.1 |
HIP 17350 |
3.43 |
| 2026-06-19 12:00 |
03:43:04.74 |
-22:52:37.9 |
HIP 17350 |
4.11 |
| 2026-06-20 00:00 |
03:43:08.72 |
-22:52:47.9 |
HIP 17350 |
4.86 |
| 2026-06-20 12:00 |
03:43:12.67 |
-22:52:58.4 |
HIP 17350 |
5.66 |
| 2026-06-21 00:00 |
03:43:16.61 |
-22:53:09.2 |
HIP 17350 |
6.49 |
| 2026-06-21 12:00 |
03:43:20.53 |
-22:53:20.3 |
HIP 17350 |
7.34 |
| 2026-06-22 00:00 |
03:43:24.43 |
-22:53:31.7 |
HIP 17350 |
8.20 |