메타데이터
| 항목 |
값 |
| Designation |
C/2001 X1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-01-08T02:12:26.190720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:11Z |
| Obs used |
203 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2002-01-06.0000000 |
| e |
0.99704180 |
| q (au) |
1.697938 |
| a (au) |
573.976425 |
| i (deg) |
115.626976 |
| Ω (om, deg) |
336.070632 |
| ω (w, deg) |
202.201070 |
| M (ma, deg) |
359.999850 |
밝기
산란 + 전체 선형
$$
M_a = (11.612 + 4.130\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.612 |
| n |
4.130 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
22:28:39.23 |
-09:07:34.9 |
HIP 111001 |
33.61 |
| 2026-09-20 12:00 |
22:28:36.87 |
-09:07:47.3 |
HIP 111001 |
33.59 |
| 2026-09-21 00:00 |
22:28:34.51 |
-09:07:59.6 |
HIP 111001 |
33.58 |
| 2026-09-21 12:00 |
22:28:32.16 |
-09:08:11.9 |
HIP 111001 |
33.57 |
| 2026-09-22 00:00 |
22:28:29.82 |
-09:08:24.1 |
HIP 111001 |
33.59 |
| 2026-09-22 12:00 |
22:28:27.49 |
-09:08:36.3 |
HIP 111001 |
33.61 |
| 2026-09-23 00:00 |
22:28:25.16 |
-09:08:48.4 |
HIP 111001 |
33.64 |
| 2026-09-23 12:00 |
22:28:22.85 |
-09:09:00.5 |
HIP 111001 |
33.68 |
| 2026-09-24 00:00 |
22:28:20.54 |
-09:09:12.5 |
HIP 111001 |
33.74 |
| 2026-09-24 12:00 |
22:28:18.25 |
-09:09:24.4 |
HIP 111001 |
33.80 |
| 2026-09-25 00:00 |
22:28:15.96 |
-09:09:36.3 |
HIP 111001 |
33.88 |
| 2026-09-25 12:00 |
22:28:13.69 |
-09:09:48.2 |
HIP 111001 |
33.96 |
| 2026-09-26 00:00 |
22:28:11.43 |
-09:10:00.0 |
HIP 111001 |
34.06 |
| 2026-09-26 12:00 |
22:28:09.17 |
-09:10:11.7 |
HIP 111001 |
34.16 |
| 2026-09-27 00:00 |
22:28:06.93 |
-09:10:23.3 |
HIP 111001 |
34.28 |
| 2026-09-27 12:00 |
22:28:04.69 |
-09:10:34.9 |
HIP 111001 |
34.40 |
| 2026-09-28 00:00 |
22:28:02.47 |
-09:10:46.5 |
HIP 110715 |
34.42 |
| 2026-09-28 12:00 |
22:28:00.26 |
-09:10:58.0 |
HIP 110715 |
33.99 |
| 2026-09-29 00:00 |
22:27:58.06 |
-09:11:09.4 |
HIP 110715 |
33.56 |
| 2026-09-29 12:00 |
22:27:55.87 |
-09:11:20.8 |
HIP 110715 |
33.15 |
| 2026-09-30 00:00 |
22:27:53.69 |
-09:11:32.0 |
HIP 110715 |
32.74 |
| 2026-09-30 12:00 |
22:27:51.52 |
-09:11:43.3 |
HIP 110715 |
32.34 |
| 2026-10-01 00:00 |
22:27:49.37 |
-09:11:54.4 |
HIP 110715 |
31.94 |
| 2026-10-01 12:00 |
22:27:47.23 |
-09:12:05.5 |
HIP 110715 |
31.56 |
| 2026-10-02 00:00 |
22:27:45.10 |
-09:12:16.6 |
HIP 110715 |
31.18 |
| 2026-10-02 12:00 |
22:27:42.98 |
-09:12:27.5 |
HIP 110715 |
30.81 |
| 2026-10-03 00:00 |
22:27:40.87 |
-09:12:38.4 |
HIP 110715 |
30.44 |
| 2026-10-03 12:00 |
22:27:38.78 |
-09:12:49.2 |
HIP 110715 |
30.08 |
| 2026-10-04 00:00 |
22:27:36.70 |
-09:13:00.0 |
HIP 110715 |
29.73 |
| 2026-10-04 12:00 |
22:27:34.63 |
-09:13:10.6 |
HIP 110715 |
29.39 |
| 2026-10-05 00:00 |
22:27:32.57 |
-09:13:21.2 |
HIP 110715 |
29.06 |
| 2026-10-05 12:00 |
22:27:30.53 |
-09:13:31.7 |
HIP 110715 |
28.73 |
| 2026-10-06 00:00 |
22:27:28.50 |
-09:13:42.2 |
HIP 110715 |
28.42 |
| 2026-10-06 12:00 |
22:27:26.49 |
-09:13:52.6 |
HIP 110715 |
28.11 |
| 2026-10-07 00:00 |
22:27:24.48 |
-09:14:02.8 |
HIP 110715 |
27.81 |
| 2026-10-07 12:00 |
22:27:22.50 |
-09:14:13.1 |
HIP 110715 |
27.52 |
| 2026-10-08 00:00 |
22:27:20.52 |
-09:14:23.2 |
HIP 110715 |
27.24 |
| 2026-10-08 12:00 |
22:27:18.56 |
-09:14:33.2 |
HIP 110715 |
26.96 |
| 2026-10-09 00:00 |
22:27:16.62 |
-09:14:43.2 |
HIP 110715 |
26.70 |
| 2026-10-09 12:00 |
22:27:14.69 |
-09:14:53.1 |
HIP 110715 |
26.44 |
| 2026-10-10 00:00 |
22:27:12.77 |
-09:15:02.9 |
HIP 110715 |
26.20 |
| 2026-10-10 12:00 |
22:27:10.87 |
-09:15:12.6 |
HIP 110715 |
25.96 |
| 2026-10-11 00:00 |
22:27:08.98 |
-09:15:22.2 |
HIP 110715 |
25.73 |