메타데이터
| 항목 |
값 |
| Designation |
C/1999 XS87 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-08-06T14:30:32.385600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:02Z |
| Obs used |
98 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2000-01-09.0000000 |
| e |
0.84057497 |
| q (au) |
2.771840 |
| a (au) |
17.386476 |
| i (deg) |
14.846408 |
| Ω (om, deg) |
266.729359 |
| ω (w, deg) |
151.354533 |
| M (ma, deg) |
2.112638 |
밝기
산란 + 전체 선형
$$
M_a = (10.066 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.066 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.759 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
15:03:22.67 |
-26:37:28.5 |
HIP 73694 |
5.51 |
| 2026-06-01 12:00 |
15:03:19.04 |
-26:37:10.1 |
HIP 73694 |
6.30 |
| 2026-06-02 00:00 |
15:03:15.42 |
-26:36:51.7 |
HIP 73694 |
7.10 |
| 2026-06-02 12:00 |
15:03:11.81 |
-26:36:33.2 |
HIP 73694 |
7.91 |
| 2026-06-03 00:00 |
15:03:08.22 |
-26:36:14.7 |
HIP 73694 |
8.73 |
| 2026-06-03 12:00 |
15:03:04.65 |
-26:35:56.3 |
HIP 73694 |
9.55 |
| 2026-06-04 00:00 |
15:03:01.09 |
-26:35:37.8 |
HIP 73694 |
10.38 |
| 2026-06-04 12:00 |
15:02:57.55 |
-26:35:19.2 |
HIP 73694 |
11.20 |
| 2026-06-05 00:00 |
15:02:54.02 |
-26:35:00.7 |
HIP 73694 |
12.03 |
| 2026-06-05 12:00 |
15:02:50.51 |
-26:34:42.1 |
HIP 73694 |
12.85 |
| 2026-06-06 00:00 |
15:02:47.02 |
-26:34:23.6 |
HIP 73694 |
13.68 |
| 2026-06-06 12:00 |
15:02:43.55 |
-26:34:05.0 |
HIP 73694 |
14.50 |
| 2026-06-07 00:00 |
15:02:40.09 |
-26:33:46.4 |
HIP 73694 |
15.32 |
| 2026-06-07 12:00 |
15:02:36.65 |
-26:33:27.8 |
HIP 73694 |
16.13 |
| 2026-06-08 00:00 |
15:02:33.23 |
-26:33:09.2 |
HIP 73694 |
16.95 |
| 2026-06-08 12:00 |
15:02:29.83 |
-26:32:50.6 |
HIP 73694 |
17.76 |
| 2026-06-09 00:00 |
15:02:26.44 |
-26:32:31.9 |
HIP 73694 |
18.57 |
| 2026-06-09 12:00 |
15:02:23.08 |
-26:32:13.3 |
HIP 73694 |
19.37 |
| 2026-06-10 00:00 |
15:02:19.73 |
-26:31:54.7 |
HIP 73694 |
20.17 |
| 2026-06-10 12:00 |
15:02:16.41 |
-26:31:36.1 |
HIP 73532 |
20.93 |
| 2026-06-11 00:00 |
15:02:13.10 |
-26:31:17.5 |
HIP 73532 |
20.40 |
| 2026-06-11 12:00 |
15:02:09.82 |
-26:30:58.8 |
HIP 73532 |
19.89 |
| 2026-06-12 00:00 |
15:02:06.55 |
-26:30:40.2 |
HIP 73532 |
19.40 |
| 2026-06-12 12:00 |
15:02:03.31 |
-26:30:21.6 |
HIP 73532 |
18.94 |
| 2026-06-13 00:00 |
15:02:00.08 |
-26:30:03.0 |
HIP 73532 |
18.49 |
| 2026-06-13 12:00 |
15:01:56.88 |
-26:29:44.5 |
HIP 73532 |
18.07 |
| 2026-06-14 00:00 |
15:01:53.70 |
-26:29:25.9 |
HIP 73532 |
17.68 |
| 2026-06-14 12:00 |
15:01:50.54 |
-26:29:07.3 |
HIP 73532 |
17.31 |
| 2026-06-15 00:00 |
15:01:47.40 |
-26:28:48.8 |
HIP 73532 |
16.97 |
| 2026-06-15 12:00 |
15:01:44.29 |
-26:28:30.2 |
HIP 73532 |
16.66 |
| 2026-06-16 00:00 |
15:01:41.20 |
-26:28:11.7 |
HIP 73532 |
16.38 |
| 2026-06-16 12:00 |
15:01:38.13 |
-26:27:53.2 |
HIP 73532 |
16.12 |
| 2026-06-17 00:00 |
15:01:35.08 |
-26:27:34.8 |
HIP 73532 |
15.90 |
| 2026-06-17 12:00 |
15:01:32.06 |
-26:27:16.3 |
HIP 73532 |
15.72 |
| 2026-06-18 00:00 |
15:01:29.06 |
-26:26:57.9 |
HIP 73532 |
15.56 |
| 2026-06-18 12:00 |
15:01:26.08 |
-26:26:39.5 |
HIP 73532 |
15.44 |
| 2026-06-19 00:00 |
15:01:23.13 |
-26:26:21.2 |
HIP 73532 |
15.35 |
| 2026-06-19 12:00 |
15:01:20.21 |
-26:26:02.8 |
HIP 73532 |
15.29 |
| 2026-06-20 00:00 |
15:01:17.31 |
-26:25:44.5 |
HIP 73532 |
15.26 |
| 2026-06-20 12:00 |
15:01:14.43 |
-26:25:26.2 |
HIP 73532 |
15.27 |
| 2026-06-21 00:00 |
15:01:11.58 |
-26:25:08.0 |
HIP 73532 |
15.31 |
| 2026-06-21 12:00 |
15:01:08.75 |
-26:24:49.8 |
HIP 73532 |
15.38 |
| 2026-06-22 00:00 |
15:01:05.95 |
-26:24:31.6 |
HIP 73532 |
15.47 |