메타데이터
| 항목 |
값 |
| Designation |
C/2013 X1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-04-20T17:29:19.973760Z |
| Orbit solution date (soln_date, UTC) |
2022-10-25T15:34:16Z |
| Obs used |
539 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-12-20.0000000 |
| e |
1.00102603 |
| q (au) |
1.314236 |
| a (au) |
-1280.894658 |
| i (deg) |
163.231932 |
| Ω (om, deg) |
130.954864 |
| ω (w, deg) |
164.460665 |
| M (ma, deg) |
-0.002639 |
밝기
산란 + 전체 선형
$$
M_a = (9.099 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.099 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
8.071 |
| 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 |
| 2013-10-17 |
2015-12-16 |
-0.6279 |
-0.078 |
| 2015-12-16 |
2016-01-10 |
+25.7145 |
-8.967 |
| 2016-01-10 |
2016-04-20 |
+10.9709 |
-4.036 |
| 2016-04-22 |
2018-01-29 |
+6.2799 |
-3.384 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
11:06:28.31 |
-05:52:43.0 |
HIP 54340 |
18.78 |
| 2026-07-29 12:00 |
11:06:31.31 |
-05:52:51.8 |
HIP 54340 |
18.66 |
| 2026-07-30 00:00 |
11:06:34.33 |
-05:53:00.9 |
HIP 54340 |
18.56 |
| 2026-07-30 12:00 |
11:06:37.38 |
-05:53:10.1 |
HIP 54340 |
18.50 |
| 2026-07-31 00:00 |
11:06:40.44 |
-05:53:19.6 |
HIP 54340 |
18.48 |
| 2026-07-31 12:00 |
11:06:43.52 |
-05:53:29.3 |
HIP 54340 |
18.49 |
| 2026-08-01 00:00 |
11:06:46.62 |
-05:53:39.2 |
HIP 54340 |
18.53 |
| 2026-08-01 12:00 |
11:06:49.74 |
-05:53:49.4 |
HIP 54340 |
18.61 |
| 2026-08-02 00:00 |
11:06:52.88 |
-05:53:59.7 |
HIP 54340 |
18.73 |
| 2026-08-02 12:00 |
11:06:56.04 |
-05:54:10.2 |
HIP 54340 |
18.89 |
| 2026-08-03 00:00 |
11:06:59.21 |
-05:54:21.0 |
HIP 54340 |
19.08 |
| 2026-08-03 12:00 |
11:07:02.41 |
-05:54:32.0 |
HIP 54340 |
19.31 |
| 2026-08-04 00:00 |
11:07:05.62 |
-05:54:43.1 |
HIP 54340 |
19.57 |
| 2026-08-04 12:00 |
11:07:08.85 |
-05:54:54.5 |
HIP 54340 |
19.87 |
| 2026-08-05 00:00 |
11:07:12.10 |
-05:55:06.1 |
HIP 54340 |
20.20 |
| 2026-08-05 12:00 |
11:07:15.37 |
-05:55:17.9 |
HIP 54340 |
20.56 |
| 2026-08-06 00:00 |
11:07:18.65 |
-05:55:29.9 |
HIP 54340 |
20.96 |
| 2026-08-06 12:00 |
11:07:21.96 |
-05:55:42.1 |
HIP 54340 |
21.38 |
| 2026-08-07 00:00 |
11:07:25.27 |
-05:55:54.5 |
HIP 54340 |
21.84 |
| 2026-08-07 12:00 |
11:07:28.61 |
-05:56:07.1 |
HIP 54340 |
22.32 |
| 2026-08-08 00:00 |
11:07:31.96 |
-05:56:19.9 |
HIP 54340 |
22.83 |
| 2026-08-08 12:00 |
11:07:35.33 |
-05:56:33.0 |
HIP 54340 |
23.36 |
| 2026-08-09 00:00 |
11:07:38.71 |
-05:56:46.2 |
HIP 54433 |
23.86 |
| 2026-08-09 12:00 |
11:07:42.11 |
-05:56:59.6 |
HIP 54433 |
23.33 |
| 2026-08-10 00:00 |
11:07:45.53 |
-05:57:13.2 |
HIP 54433 |
22.81 |
| 2026-08-10 12:00 |
11:07:48.96 |
-05:57:27.0 |
HIP 54433 |
22.32 |
| 2026-08-11 00:00 |
11:07:52.40 |
-05:57:41.0 |
HIP 54433 |
21.84 |
| 2026-08-11 12:00 |
11:07:55.86 |
-05:57:55.2 |
HIP 54433 |
21.38 |
| 2026-08-12 00:00 |
11:07:59.34 |
-05:58:09.6 |
HIP 54433 |
20.95 |
| 2026-08-12 12:00 |
11:08:02.83 |
-05:58:24.1 |
HIP 54433 |
20.54 |
| 2026-08-13 00:00 |
11:08:06.33 |
-05:58:38.9 |
HIP 54433 |
20.17 |
| 2026-08-13 12:00 |
11:08:09.85 |
-05:58:53.9 |
HIP 54433 |
19.82 |
| 2026-08-14 00:00 |
11:08:13.38 |
-05:59:09.0 |
HIP 54433 |
19.51 |
| 2026-08-14 12:00 |
11:08:16.92 |
-05:59:24.3 |
HIP 54433 |
19.23 |
| 2026-08-15 00:00 |
11:08:20.48 |
-05:59:39.8 |
HIP 54433 |
18.99 |
| 2026-08-15 12:00 |
11:08:24.05 |
-05:59:55.5 |
HIP 54433 |
18.79 |
| 2026-08-16 00:00 |
11:08:27.63 |
-06:00:11.4 |
HIP 54433 |
18.63 |
| 2026-08-16 12:00 |
11:08:31.22 |
-06:00:27.4 |
HIP 54433 |
18.51 |
| 2026-08-17 00:00 |
11:08:34.83 |
-06:00:43.7 |
HIP 54433 |
18.44 |
| 2026-08-17 12:00 |
11:08:38.44 |
-06:01:00.1 |
HIP 54433 |
18.41 |
| 2026-08-18 00:00 |
11:08:42.07 |
-06:01:16.7 |
HIP 54433 |
18.43 |
| 2026-08-18 12:00 |
11:08:45.71 |
-06:01:33.4 |
HIP 54433 |
18.49 |
| 2026-08-19 00:00 |
11:08:49.36 |
-06:01:50.3 |
HIP 54433 |
18.60 |