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) |
| 2026-05-12 00:00 |
15:05:56.77 |
-26:49:06.6 |
HIP 73835 |
7.90 |
| 2026-05-12 12:00 |
15:05:52.80 |
-26:48:50.4 |
HIP 73835 |
7.12 |
| 2026-05-13 00:00 |
15:05:48.83 |
-26:48:34.2 |
HIP 73835 |
6.39 |
| 2026-05-13 12:00 |
15:05:44.85 |
-26:48:17.8 |
HIP 73835 |
5.72 |
| 2026-05-14 00:00 |
15:05:40.89 |
-26:48:01.4 |
HIP 73835 |
5.13 |
| 2026-05-14 12:00 |
15:05:36.92 |
-26:47:44.9 |
HIP 73835 |
4.64 |
| 2026-05-15 00:00 |
15:05:32.96 |
-26:47:28.3 |
HIP 73835 |
4.31 |
| 2026-05-15 12:00 |
15:05:29.00 |
-26:47:11.7 |
HIP 73835 |
4.17 |
| 2026-05-16 00:00 |
15:05:25.05 |
-26:46:54.9 |
HIP 73835 |
4.22 |
| 2026-05-16 12:00 |
15:05:21.10 |
-26:46:38.1 |
HIP 73835 |
4.48 |
| 2026-05-17 00:00 |
15:05:17.15 |
-26:46:21.2 |
HIP 73835 |
4.89 |
| 2026-05-17 12:00 |
15:05:13.21 |
-26:46:04.3 |
HIP 73835 |
5.44 |
| 2026-05-18 00:00 |
15:05:09.28 |
-26:45:47.3 |
HIP 73835 |
6.08 |
| 2026-05-18 12:00 |
15:05:05.35 |
-26:45:30.2 |
HIP 73835 |
6.78 |
| 2026-05-19 00:00 |
15:05:01.42 |
-26:45:13.0 |
HIP 73835 |
7.53 |
| 2026-05-19 12:00 |
15:04:57.51 |
-26:44:55.8 |
HIP 73835 |
8.32 |
| 2026-05-20 00:00 |
15:04:53.60 |
-26:44:38.5 |
HIP 73835 |
9.13 |
| 2026-05-20 12:00 |
15:04:49.70 |
-26:44:21.2 |
HIP 73835 |
9.96 |
| 2026-05-21 00:00 |
15:04:45.80 |
-26:44:03.8 |
HIP 73835 |
10.80 |
| 2026-05-21 12:00 |
15:04:41.91 |
-26:43:46.3 |
HIP 73835 |
11.65 |
| 2026-05-22 00:00 |
15:04:38.04 |
-26:43:28.8 |
HIP 73835 |
12.51 |
| 2026-05-22 12:00 |
15:04:34.17 |
-26:43:11.2 |
HIP 73694 |
12.25 |
| 2026-05-23 00:00 |
15:04:30.30 |
-26:42:53.5 |
HIP 73694 |
11.36 |
| 2026-05-23 12:00 |
15:04:26.45 |
-26:42:35.9 |
HIP 73694 |
10.48 |
| 2026-05-24 00:00 |
15:04:22.61 |
-26:42:18.1 |
HIP 73694 |
9.60 |
| 2026-05-24 12:00 |
15:04:18.78 |
-26:42:00.3 |
HIP 73694 |
8.73 |
| 2026-05-25 00:00 |
15:04:14.95 |
-26:41:42.5 |
HIP 73694 |
7.87 |
| 2026-05-25 12:00 |
15:04:11.14 |
-26:41:24.6 |
HIP 73694 |
7.02 |
| 2026-05-26 00:00 |
15:04:07.34 |
-26:41:06.7 |
HIP 73694 |
6.19 |
| 2026-05-26 12:00 |
15:04:03.55 |
-26:40:48.7 |
HIP 73694 |
5.38 |
| 2026-05-27 00:00 |
15:03:59.77 |
-26:40:30.7 |
HIP 73694 |
4.61 |
| 2026-05-27 12:00 |
15:03:56.00 |
-26:40:12.6 |
HIP 73694 |
3.88 |
| 2026-05-28 00:00 |
15:03:52.25 |
-26:39:54.5 |
HIP 73694 |
3.25 |
| 2026-05-28 12:00 |
15:03:48.51 |
-26:39:36.4 |
HIP 73694 |
2.76 |
| 2026-05-29 00:00 |
15:03:44.78 |
-26:39:18.2 |
HIP 73694 |
2.50 |
| 2026-05-29 12:00 |
15:03:41.06 |
-26:39:00.0 |
HIP 73694 |
2.54 |
| 2026-05-30 00:00 |
15:03:37.35 |
-26:38:41.8 |
HIP 73694 |
2.86 |
| 2026-05-30 12:00 |
15:03:33.66 |
-26:38:23.5 |
HIP 73694 |
3.39 |
| 2026-05-31 00:00 |
15:03:29.98 |
-26:38:05.2 |
HIP 73694 |
4.04 |
| 2026-05-31 12:00 |
15:03:26.32 |
-26:37:46.8 |
HIP 73694 |
4.75 |
| 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 |