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 |
+6.3516 |
-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) |
| 2026-05-12 00:00 |
03:37:25.66 |
-22:57:12.9 |
HIP 16848 |
29.31 |
| 2026-05-12 12:00 |
03:37:30.23 |
-22:56:56.0 |
HIP 16848 |
29.36 |
| 2026-05-13 00:00 |
03:37:34.79 |
-22:56:39.6 |
HIP 16848 |
29.45 |
| 2026-05-13 12:00 |
03:37:39.36 |
-22:56:23.4 |
HIP 16848 |
29.59 |
| 2026-05-14 00:00 |
03:37:43.93 |
-22:56:07.6 |
HIP 16848 |
29.78 |
| 2026-05-14 12:00 |
03:37:48.51 |
-22:55:52.2 |
HIP 16848 |
30.01 |
| 2026-05-15 00:00 |
03:37:53.08 |
-22:55:37.0 |
HIP 16848 |
30.27 |
| 2026-05-15 12:00 |
03:37:57.66 |
-22:55:22.3 |
HIP 16848 |
30.59 |
| 2026-05-16 00:00 |
03:38:02.23 |
-22:55:07.8 |
HIP 16848 |
30.94 |
| 2026-05-16 12:00 |
03:38:06.81 |
-22:54:53.7 |
HIP 16848 |
31.33 |
| 2026-05-17 00:00 |
03:38:11.39 |
-22:54:40.0 |
HIP 16848 |
31.75 |
| 2026-05-17 12:00 |
03:38:15.97 |
-22:54:26.6 |
HIP 16848 |
32.21 |
| 2026-05-18 00:00 |
03:38:20.55 |
-22:54:13.6 |
HIP 16848 |
32.71 |
| 2026-05-18 12:00 |
03:38:25.12 |
-22:54:00.8 |
HIP 16848 |
33.24 |
| 2026-05-19 00:00 |
03:38:29.70 |
-22:53:48.5 |
HIP 16848 |
33.79 |
| 2026-05-19 12:00 |
03:38:34.28 |
-22:53:36.5 |
HIP 16848 |
34.38 |
| 2026-05-20 00:00 |
03:38:38.85 |
-22:53:24.8 |
HIP 17048 |
34.77 |
| 2026-05-20 12:00 |
03:38:43.42 |
-22:53:13.5 |
HIP 17048 |
34.33 |
| 2026-05-21 00:00 |
03:38:48.00 |
-22:53:02.6 |
HIP 17048 |
33.93 |
| 2026-05-21 12:00 |
03:38:52.56 |
-22:52:52.0 |
HIP 17048 |
33.56 |
| 2026-05-22 00:00 |
03:38:57.13 |
-22:52:41.7 |
HIP 17048 |
33.23 |
| 2026-05-22 12:00 |
03:39:01.69 |
-22:52:31.8 |
HIP 17048 |
32.93 |
| 2026-05-23 00:00 |
03:39:06.25 |
-22:52:22.2 |
HIP 17048 |
32.68 |
| 2026-05-23 12:00 |
03:39:10.81 |
-22:52:13.0 |
HIP 17048 |
32.46 |
| 2026-05-24 00:00 |
03:39:15.36 |
-22:52:04.2 |
HIP 17048 |
32.28 |
| 2026-05-24 12:00 |
03:39:19.91 |
-22:51:55.7 |
HIP 17048 |
32.15 |
| 2026-05-25 00:00 |
03:39:24.46 |
-22:51:47.5 |
HIP 17048 |
32.05 |
| 2026-05-25 12:00 |
03:39:29.00 |
-22:51:39.7 |
HIP 17048 |
31.99 |
| 2026-05-26 00:00 |
03:39:33.53 |
-22:51:32.2 |
HIP 17048 |
31.98 |
| 2026-05-26 12:00 |
03:39:38.06 |
-22:51:25.1 |
HIP 17048 |
32.00 |
| 2026-05-27 00:00 |
03:39:42.59 |
-22:51:18.4 |
HIP 17048 |
32.06 |
| 2026-05-27 12:00 |
03:39:47.11 |
-22:51:12.0 |
HIP 17048 |
32.17 |
| 2026-05-28 00:00 |
03:39:51.62 |
-22:51:05.9 |
HIP 17048 |
32.31 |
| 2026-05-28 12:00 |
03:39:56.13 |
-22:51:00.2 |
HIP 17048 |
32.49 |
| 2026-05-29 00:00 |
03:40:00.63 |
-22:50:54.9 |
HIP 17048 |
32.71 |
| 2026-05-29 12:00 |
03:40:05.13 |
-22:50:49.9 |
HIP 17048 |
32.97 |
| 2026-05-30 00:00 |
03:40:09.62 |
-22:50:45.2 |
HIP 17048 |
33.26 |
| 2026-05-30 12:00 |
03:40:14.10 |
-22:50:40.9 |
HIP 17048 |
33.58 |
| 2026-05-31 00:00 |
03:40:18.57 |
-22:50:37.0 |
HIP 17048 |
33.94 |
| 2026-05-31 12:00 |
03:40:23.04 |
-22:50:33.4 |
HIP 17290 |
33.84 |
| 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 |